A thermos flask is a great investment for any traveler. If you need to carry coffee, tea, cocoa, soup, or fresh fruit, a thermos flask keeps beverages and food at the perfect temperature until you are ready to enjoy them.
Enjoy your Favorite Beverages and Food with a Fully Insulated Thermos Flask
Keeping beverages hot or cold for hours is a challenge when you are traveling. However, when you have a fully insulated thermos flask, you will enjoy piping hot and icy cold beverages on the go, anywhere, anytime.
Incredibly versatile, this amazing invention is not just designed to hold coffee, tea, cocoa, water, or juice. A thermos flask, also called a vacuum flask, beverage bottle, or food jar offers you the convenience of traveling with ready-to-eat soup, pasta, or fruit. So whether you are camping, hiking, fishing, hunting, working on a construction site, or studying at college, a thermos flask is an essential travel buddy.
The 7 Best Thermos Flasks
- Stanley Classic Vacuum Insulated Bottle (Our Top Pick)
- Thermos Beverage Bottle
- MIRA 13.5-ounce Food Jar Thermos Flask
- Thermos King Vacuum Insulated Food Jar
- Isosteel VA-9562D Duo 1-liter Flask
- VONDIOR 102-ounce Coffee Carafe Thermos Flask
- Sacred Lotus Love 18-ounce Bamboo Tumbler Thermos Flask
Our Top Pick for the Best Thermos Flask
Our top pick for the best thermos flask is the Stanley Classic Vacuum Insulated Bottle.
Wherever your travels take you, the Stanley Classic Thermos Flask is the perfect travel buddy. It has everything you need to enjoy your favorite hot or cold beverage on the go. A solid stainless steel construction, highly effective superior double-walled vacuum insulation, a leak-proof stopper, and an insulated lid that doubles as a drinking cup.
Check the price on AmazonHow to Choose the Best Thermos Flask
Size
Thermos flasks come in 4 sizes, small, medium, large and extra-large.
– Small Thermos Flask
A smaller-sized thermos flask, such as the MIRA 13.5-ounce Food Jar Thermos Flask, is just right for a child or an adult and it can be used to hold coffee, juice, or a healthy snack such as pasta or fruit. Its lightweight and ultra-compact design also mean it is easy to store in your backpack.
– Medium Thermos Flask
Medium-sized thermos flasks, such as the Sacred Lotus Love 18-ounce Bamboo Tumbler Thermos Flask or the Thermos Beverage Bottle are a great choice for enjoying a nice hot cup of tea at work or warming soup for 2 people on a wintry skiing day trip.
– Large Thermos Flask
Large-sized thermos flasks, such a the Isosteel VA-9562D Duo 1-liter Flask, are an excellent choice for sharing hot or cold drinks with a couple of friends. It is also the perfect beverage holder for a construction worker who needs a caffeine hit throughout the day.
– Extra-large Thermos Flask
An extra-large thermos flask, such as the Stanley Classic Vacuum Insulated Bottle, is tailor-made for a father and son fishing expedition. The VONDIOR 102-ounce Coffee Carafe Thermos Flask is a fantastic choice for sharing steaming hot coffee with family or friends.
Construction
Stainless steel is the best material for any beverage holder, whether it is a thermos flask, water bottle, or travel mug. It is strong, sturdy, durable, highly rust-resistant, naturally BPA-free, and does not absorb odors.
– Double Wall Vacuum Insulation
A quality thermos flask must have double-wall vacuum insulation. This innovative technology is incredibly effective at maintaining the temperature of hot and cold liquids for an exceptionally long period.
– How Does Double Wall Insulation Technology Work?
By removing the air between the outer and inner layers of stainless steel, heat is blocked from transferring through the stainless steel, which greatly minimizes the temperature change of your hot or cold beverage.
Vacuum insulation technology ensures that your drink will stay hot or cold for hours but keeps the outside of the thermos cool to the touch.
The overall temperature control may also depend on a few factors. For hot drinks, you need to pre-heat the thermos with boiling water to keep liquids or food hotter for longer. For cold drinks, ice cubes will keep the liquid colder for a long period. You should also make sure that the lid or stopper is closed when you are not using the thermos to trap the heat and cold inside.
Stopper and Cap
Thermos flasks will come with both a stopper and a cap which effectively prevents spills and leaks. Some thermos flasks are designed with a stopper that stays in place while the liquid is poured into the cap, such as the Thermos Beverage Bottle. This smart design feature helps you to control the beverage’s flow and prevents the liquid from spilling out of the thermos if it tips over.
You may also have the option of taking the stopper out and just use the cap, but this could result in leaks and having to clean the thermos more often. To ensure that the thermos stays leak-free, do not over-tighten the cap as this can break the seal. The cap also needs to be aligned properly otherwise this can cause leakage.
– A Cap that Doubles as a Drinking Cup
One of the most distinguishing features of most thermos flasks is the cap that doubles as a drinking cup. This is an ultra-convenient option for solo travelers. Instead of carrying an extra cup with you, just open the thermos, pour your coffee or soup into the cap. When you have finished, rinse out the cap and reattach it. Nothing could be simpler!
Handle
A thermos may or may not have a handle. In particular, a locking handle does make the thermos easier and safer to carry but most manufacturers design their thermos flasks with a cool-to-the-touch, non-sweat, and condensation-free exterior surface.
7 Best Thermos Flasks – Reviews
1. Stanley Classic Vacuum Insulated Bottle
The Stanley Classic Vacuum Insulated Bottle is a fantastic thermos flask that is tailor-made for a fishing trip or an overnight camp-out with a few friends.
Made in the US for rough outdoor conditions, the unbreakable thick food-grade 18/8 stainless steel body is tough and naturally BPA-free, rust-resistant, and odor-resistant. The durable Hammertone light green powder-coated finish also gives the thermos a timeless appeal.
Innovative double-wall vacuum insulation keeps coffee, tea, cocoa, or soup hot for an impressive 32 hours and cold drinks up to 160 hours if you use ice.
Highly functional, the leak-proof lid also doubles as an 8-ounce drinking cup. For easy pouring, drinking, and cleaning, the twist-open stopper pours at any angle and the wide opening accommodates ice cubes. The easy-grab sturdy locking handle can be used with work gloves and the foldable handle makes the thermos ultra compact for storage in your camping gear or backpack.
The classic thermos is also available in other sizes.
Stanley offers a lifetime warranty on its thermos flask.
Pros
- High quality
- Excellent value for money
- Good price
- Extra-large capacity
- Effective double wall vacuum insulation
- Unbreakable thick food-grade 18/8 stainless steel body
- Naturally BPA-free and highly rust-resistant
- Does not absorb odors
- Durable Hammertone light-green powder-coated finish
- Classic timeless appeal
- Keeps drinks hot or cold 32 hours and iced drinks up to 160 hours
- Leak-proof insulated lid doubles as an 8-ounce cup
- Wide opening accommodates ice cubes
- Twist-open stopper pours at any angle
- Easy to clean
- Sturdy easy-grab locking handle can be used with work gloves
- Easy to pack away
- Available in other sizes
- Lifetime warranty
Cons
- Handle can slip easily out of place
- Can be difficult to screw the stopper back on
- Thermos needs to be preheated with hot water for 5 minutes to ensure long-term heating
2. Thermos Beverage Bottle
Whether are exploring the wilderness or working on a job site, the Thermos Beverage Bottle is the perfect thermos for family camping or outdoor enthusiasts.
The thermos flask is built for harsh outdoor environments, with an unbreakable durable double-wall stainless steel construction. Smart vacuum insulation technology provides maximum temperature retention to keep drinks hot or cold for an impressive 24 hours.
You can safely grip the thermos as its stay-cool-to-the-touch surface is sweat and condensation-free.
The easy twist-and-pour function allows you to pour your coffee, tea, or water without moving the leak-free stopper. You can also use the cap as an insulated serving cup. Carrying the thermos is effortless with a convenient handle.
The thermos comes in 3 stylish colors: matte black, cranberry, and stainless steel.
Thermos offers a 5-year limited warranty on its beverage bottle thermos flask.
Pros
- High quality
- Great value for money
- Very good price
- Extra large capacity
- Unbreakable durable double-walled stainless steel construction
- Smart vacuum insulation technology
- Keeps hot or cold liquids up to 24 hours
- Cool-to-the-touch sweat-proof and condensation-free surface
- Insulated cap doubles as a serving cup
- Easy twist-and-pour function without having to remove the stopper
- Convenient carrying handle
- Three stylish colors
- Five-year limited warranty
Cons
- Can leak if the stopper is not aligned properly
- Not ideal for cleaning in the dishwasher or for use with harsh detergents
3. MIRA 13.5-ounce Food Jar Thermos Flask
Whether you are planning a hiking trip or want to pack a healthy lunch for your child at school, the MIRA 13.5-ounce Food Jar Thermos Flask is an amazing thermos that can be used for beverages and food.
Made from premium-grade durable 18/8 food-grade stainless steel and featuring superior double-wall insulation, the food jar offers you endless hot and cold beverage and food storage choices. You can use it for a hot lunch such as soup or pasta or a healthy snack such as fresh and dried fruit or pretzels.
It keeps beverages or food hot for up to 5 hours or cold beverages or food cold for up to 10 hours and the firm leak-proof seal prevents any messy leaks. The eco-friendly thermos is safe to use as the interior of the lid is BPA, phthalate, lead, and PVC-free.
The easy-to-fill wide mouth is easy to drink out of and use a spoon, and the wide mouth also makes the thermos easy to clean.
With a compact, lightweight design, the food jar thermos will fit easily in your backpack, briefcase, or in your child’s lunchbox.
Stylish and functional, the thermos comes in a variety of colors.
MIRA offers a 30-day money-back guarantee on its food jar thermos flask.
Pros
- High quality
- Great value for money
- Very affordable price
- Perfect for lunches, soups, and snacks
- Can be used for soups, pasta, fresh and dried fruit, or pretzels
- Ideal for adults and kids
- Eco-friendly and reusable
- BPA, phthalates, lead and PVC free
- Sturdy and durable premium-grade 18/8 double-wall stainless steel
- Superior vacuum insulation
- Keeps liquids hot for up to 5 hours and cold for up to 10 hours
- Easy-to-fill wide mouth
- Easy to clean
- Compact and easy to pack
- Leak-proof firm seal
- Available in a variety of colors
- 30-day money-back guarantee
Cons
- Food or liquids should not be stored in the thermos for more than 24 hours
- Rubber ring must be removed for proper cleaning
- Lid can be hard to remove if you put the sealing ring back on the wrong way
- Can leak if you overfill the thermos
- Coating can chip
- Need to pre-heat with boiling water
4. Thermos King Vacuum Insulated Food Jar
Sleek, stylish, and ultra-functional, the Thermos King Vacuum Insulated Food Jar is a great choice for busy travelers.
Made from durable 18/8 stainless steel inside and outside, the food jar thermos is ideal for rough outdoor adventures. You can use the food jar thermos for hot and cold beverages and food such as coffee, tea, soup, oatmeal, pasta, sausages, smoothies, juice, or even fresh fruit.
The innovative vacuum insulation technology provides maximum temperature retention for hot or cold beverages. Liquid stays hot for up to 14 hours and cold items up to 24 hours. You can hold the thermos safely as it has a contoured body and its cool-to-the-touch surface is sweat and condensation-free. Any plastic parts inside the lid or on the leak-free stopper are BPA-free.
The wide easy-to-fill mouth allows you to use a spoon and eat your soup straight of the thermos, and it also makes the thermos easy to clean. You can also use the lid as a serving bowl.
To maximize the incredible insulation technology, it is recommended that you either pre-chill the thermos in the fridge or pre-heat the thermos with boiling water just before use. Attaching the lid will increase the thermal efficiency when you are not using the flask. You can easily store the thermos in your backpack or suitcase as it has a compact lightweight design.
The food jar thermos is available in 24-ounce and 47-ounce sizes. You can also choose from four stylish colors: cranberry, matte black, midnight blue, and stainless steel.
Pros
- High quality
- Great value for money
- Good price
- Superior thermos vacuum insulation technology
- Keeps liquids hot up to 14 hours and cold up to 24 hours
- Durable stainless steel interior and exterior
- Cool-to-the-touch surface is sweat and condensation-free
- Compact and lightweight
- Insulated stainless steel lid
- BPA-free leak-free plastic parts
- Wide easy-to-fill mouth
- Lid can be used as a serving bowl
- Easy to clean
- Two sizes
- Four stylish colors
Cons
- Need to add boiling water to increase thermal efficiency
- Not dishwasher safe
- Opening is a bit small for a large spoon
5. Isosteel VA-9562D Duo 1-liter Flask
Wherever your travels take you, to the office, the beach, hunting, or the campsite, the Isosteel VA-9562D Duo 1-liter Flask supplies hot or cold beverages on-demand.
This sleek and stylish FDA-certified thermos flask is made from durable 18/8 food-grade stainless steel and any plastic parts are BPA-free. Its highly effective double-walled insulation keeps liquids hot up to 24 hours and cold up to 48 hours.
If you need instant warmth in wintry conditions or fast hydration in hot sunny weather, the screwcap provides extra insulation and prevents any leaks. Isosteel’s Smart Quickstop system allows for easy pouring. The Isosteel thermos flask features 2 stainless steel drinking mugs: one fits on top of the flask and the other on the bottom, so this flask is ideal for 2 people.
For easy carrying, the thermos has a sturdy foldable handle and a removable shoulder strap.
Isosteel offers a 5-year limited warranty on its thermos flask.
Pros
- High quality
- Great value for money
- Good price
- Sleek and stylish design
- Durable 18/8 food-grade stainless steel
- Highly effective double-wall vacuum insulation technology
- BPA free plastic parts
- FDA-certified
- Keeps liquids hot for 24 hours and cold liquids for up to 48 hours
- Leak-free insulated cap
- Quickstop system allows for easy pouring
- Two stainless steel drinking mugs
- Sturdy handle
- Removable shoulder strap
- Five-year limited warranty
Cons
- Plastic parts can break easily
- Can be heavy when it is full of liquid
6. VONDIOR 102-ounce Coffee Carafe Thermos Flask
Whether you need to serve hot coffee in the school staff room, at the campsite, or a social function, the VONDIOR 102-ounce Coffee Carafe Thermos Flask is the perfect solution.
The sleek and elegant stainless steel dispenser keeps beverages hot or cold for up to 20 hours due to the superior double-wall insulation. With just one press of a button on top of the lid, you can fill up to 15 coffee cups.
You can use it almost anywhere, even in rough outdoor conditions as the beautiful brushed stainless steel construction is durable and cleans easily. Any plastic parts are heat-resistant and BPA-free. Coffee and tea will always taste fresh and delicious as the stainless steel interior does not absorb any flavors.
A flip-top lid makes it very easy to add your hot coffee and the wide mouth top accommodates ice cubes to make refreshingly fruity iced tea.
The thermos has an easy-carry handle and the sturdy base keeps it securely positioned on a countertop or table as you dispense your coffee and tea to delighted friends and family.
VONDIOR also includes a bonus-free cleaning brush to keep your thermos looking great and in perfect working order.
The thermos flask is covered by a 100% 30-day full money-back guarantee and a 90-day refund guarantee.
Pros
- High quality
- Great value for money
- Good price
- Can be used for coffee, tea, or iced tea
- Ideal for inside and outside use
- Keeps beverages hot or cold for up to 20 hours
- Beautiful and elegant brushed stainless steel
- Durable construction
- Sleek and stylish
- Superior double wall insulation
- Quick and easy to use pump-action button
- Extra large capacity holds up to 15 coffee cups
- Wide-mouth accommodates ice cubes
- Easy to clean
- Stainless steel interior never absorbs flavors
- BPA-free plastic
- Easy-carry handle
- Sturdy base
- Bonus free cleaning brush
- 100% 30-day money-back guarantee
- 90-day full refund guarantee
Cons
- Thermos needs to be preheated with hot water first
- Can leak if it is overfilled
- May not stay piping hot right up to 20 hours
- Plastic is a bit thin and can break easily
- Bulky design is not suited for storage in a backpack
7. Sacred Lotus Love 18-ounce Bamboo Tumbler Thermos Flask
This beautiful designed Sacred Lotus Love 18-ounce Bamboo Tumbler Thermos Flask is a superb beverage holder for tea lovers.
The thermos flasks’ unique casing is made from natural 100% organic sustainable bamboo. Your tea will always taste fresh as the interior and leak-proof vacuum sealed lid is made from food-grade 18/8 stainless steel. Super smart double wall insulation technology ensures that beverages stay hot for 12 hours and cold drinks for 24 hours.
Highly versatile, the thermos can be used for loose or bagged black tea, fruit infusions, hot or iced organic coffee, cocoa, smoothies, or water.
Stylish and functional, the flask’s body and removable stainless steel strainer/infuser display a subtle but beautiful Love Anahata Sacred Geometry design and an Only Love engraving. The strainer and infuser are designed to stop any escaping tea leaves from spoiling your cup of tea.
You can use the FDA-approved thermos safely as the exterior surface is sweat-free and any parts are BPA and lead-free. The thermos can be placed on any type of surface due to its new non-slip rubber bottom that protects delicate surfaces.
As it has a lightweight, slimline design, is it so easy to carry and will fit in most car drink holders. Before you use your tea thermos, wash it out thoroughly with baking soda to remove any chemical smells.
The thermos is gift-ready and comes in stylish and modern packaging, with an inspiring poem and a Rumi gift card.
Pros
- High quality
- Very good value for money
- Beautiful stylish design
- Perfect for loose leaf tea, fruit infusions, iced or hot organic coffee, cocoa, smoothies or water
- Natural 100% organic bamboo casing
- Durable 18/8 food-grade stainless steel interior
- Leak-proof vacuum sealed stainless steel lid
- Super smart double wall vacuum insulation
- 18/8 food-grade stainless steel removable strainer and infuser
- Strainer and infuser stop tea leaves from escaping
- Keeps drinks hot for 12 hours and cold for 24 hours
- Lightweight and slimline design
- Fits in most car drink holders
- New anti-slip rubber bottom
- FDA-approved
- BPA-free and lead-free
- Comes in a stylish modern packaging
- Beautiful design and engraving
- Inspiring poem
- Rumi gift card
- 100% refund or replacement warranty
Cons
- Can leak if overfilled
- Has a funny chemical smell inside
Our Top Pick for the Best Thermos Flask
Our top pick for the best thermos flask is the Stanley Classic Vacuum Insulated Bottle.
Wherever your travels take you, the Stanley Classic Thermos Flask is the perfect travel buddy. It has everything you need to enjoy your favorite hot or cold beverage on the go. A solid stainless steel construction, highly effective superior double-walled vacuum insulation, a leak-proof stopper, and an insulated lid that doubles as a drinking cup.
Check the price on Amazon
