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Thermos Ultimate Flask Comparison - April 2026

7 Best Thermos Ultimate Flask In the UK

1
Best Choice
9.7Exceptional
2
9.6Exceptional
3
Best Value
9.5Excellent
4
9.4Excellent
5
9.3Excellent
6
9.2Excellent
7
8.9Very Good
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Model

Thermos - Stainless King Red Travel Flask (1.2L) - Premium Leak Proof Insulated Tea & Coffee Flask for Hot & Cold Drinks, Built-in Cup, Twist-Pour Stopper, BPA-Free, Durable Steel
Model
Thermos - Charcoal Ultimate Flask (900ml), Reusable Insulated Stainless Steel Thermal Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 24hr Hot/24hr Cold
Model
Thermos - Stainless King Midnight Blue Travel Flask (1.2L) Premium Leak Proof Insulated Tea & Coffee Flask, Hot & Cold Drinks, Built-in Cup, Twist-Pour Stopper, BPA-Free, Durable Steel
Model
Thermos - Matt Black Ultimate Flask (500ml), Reusable Insulated Stainless Steel Thermal Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 24hr Hot/24hr Cold
Model
Thermos - Charcoal Ultimate Flask (500ml), Reusable Insulated Stainless Steel Thermal Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 24hr Hot/24hr Cold
Model
Thermos - Charcoal Direct Drink Flask (470ml) Reusable Insulated Stainless Steel Thermal Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 10hr Hot/24hr Cold
Model
Thermos - Light and Compact Flask, Midnight Blue (1L) - Premium Leak Proof Insulated Tea & Coffee Flask for Hot & Cold Drinks, Built-in Cup, Push Button Stopper, BPA-Free, Durable Steel

Brand

Thermos
Brand
Thermos
Brand
Thermos
Brand
Thermos
Brand
Thermos
Brand
Thermos
Brand
Thermos

Reviews

47,224 reviews
Reviews
6,528 reviews
Reviews
47,224 reviews
Reviews
6,528 reviews
Reviews
6,528 reviews
Reviews
11,546 reviews
Reviews
24,004 reviews

Features

Watertight

9.9
Watertight
9.9
Watertight
9.9
Watertight
9.6
Watertight
9.9
Watertight
9.9
Watertight
9.8

Simple to clean

9.6
Simple to clean
9.8
Simple to clean
9.6
Simple to clean
9.3
Simple to clean
9.8
Simple to clean
9.1
Simple to clean
9.6

Durability

9.8
Durability
9.8
Durability
9.8
Durability
9.4
Durability
9.8
Durability
9.9
Durability
9.8

Lasts a long time

9.6
Lasts a long time
9.6
Lasts a long time
9.8
Lasts a long time
9.3
Lasts a long time
9.8
Lasts a long time
9.9
Lasts a long time
9.6

Simple to use

9.9
Simple to use
9.8
Simple to use
9.9
Simple to use
9.6
Simple to use
9.8
Simple to use
9.9
Simple to use
9.8

Easy to grip

9.8
Easy to grip
9.8
Easy to grip
9.8
Easy to grip
9.4
Easy to grip
9.8
Easy to grip
9.9
Easy to grip
9.8

Temperature control

9.8
Temperature control
9.9
Temperature control
9.8
Temperature control
9.6
Temperature control
9.9
Temperature control
9.9
Temperature control
9.8

Tech Specs

dishwasher safe

‎No
dishwasher safe
‎No
dishwasher safe
‎No
dishwasher safe
‎No
dishwasher safe
‎No
dishwasher safe
No
dishwasher safe
‎No

product dimensions

‎32.41 x 15.01 x 9.8 cm; 289.99 g
product dimensions
‎11.81 x 11.81 x 3.46 cm; 390 g
product dimensions
‎3.74 x 4.29 x 12.32 cm; 659.98 g
product dimensions
‎7.24 x 7.24 x 23.6 cm; 291 g
product dimensions
‎7.2 x 7.2 x 23.6 cm; 290 g
product dimensions
9.13 x 9.13 x 2.76 cm 285 g
product dimensions
‎8 x 8 x 31 cm; 510 g

care instructions

‎Hand Wash Only
care instructions
‎Hand Wash Only
care instructions
‎Dishwasher-safe
care instructions
‎Hand Wash Only
care instructions
‎Hand Wash Only
care instructions
Hand Wash Only
care instructions
‎Wipe clean

batteries required

‎No
batteries required
‎No
batteries required
‎No
batteries required
‎No
batteries required
‎No
batteries required
No
batteries required
‎No

item volume

‎1200 Millilitres
item volume
‎900 Millilitres
item volume
‎1200 Millilitres
item volume
-
item volume
‎500 Millilitres
item volume
470 Millilitres
item volume
‎1000 Millilitres

included components

‎KING S/S FLASK & HANDLE 1.2LT RED
included components
‎Lid Cup, Pouring Spout, Protective Silicone Rings, Stainless Steel Bottle, Two Part Stopper
included components
‎Handle, Insulated Stainless Steel Serving Cup, Stainless Steel Bottle, Twist & Pour Stopper
included components
‎Durable Stainless Steel Flask, Protective Silicone Rings, Serving Cup Lid, Two Part Pouring Stopper
included components
‎Lid Cup, Pouring Spout, Protective Silicone Rings, Stainless Steel Bottle, Two Part Stopper
included components
-
included components
‎Lid

item weight

‎10.23 Ounces
item weight
‎390 Grams
item weight
‎660 g
item weight
‎291 Grams
item weight
-
item weight
285 Grams
item weight
-

is assembly required

‎No
is assembly required
-
is assembly required
‎No
is assembly required
-
is assembly required
-
is assembly required
-
is assembly required
‎No

Available On

Available On
Available On
Available On
Available On
Available On
Available On

Our Top 3 Picks

Here are the top 3 recommended products with more information to help you find the right product for you
  • 9.7
    1
    Thermos

    Thermos - Stainless King Red Travel Flask (1.2L) - Premium Leak Proof Insulated Tea & Coffee Flask for Hot & Cold Drinks, Built-in Cup, Twist-Pour Stopper, BPA-Free, Durable Steel

    9.9 Watertight
    9.9 Simple to use
    9.8 Durability

    Why we love it

    Keeps drinks hot or cold for 24 hours.
    Durable stainless steel build.
    Easy to pour without removing stopper.
  • 9.6
    2
    Thermos

    Thermos - Charcoal Ultimate Flask (900ml), Reusable Insulated Stainless Steel Thermal Coffee Cup for Hot or Cold Drinks, Vacuum Sealed Water Flask with a Leak-Proof Lid, 24hr Hot/24hr Cold

    9.9 Watertight
    9.9 Temperature control
    9.8 Simple to clean

    Why we love it

    Keeps drinks hot or cold for 24 hours.
    Durable stainless steel with silicone protection.
    Comfortable pouring with two-part stopper.
  • 9.5
    3
    Thermos
    16% Off

    Thermos - Stainless King Midnight Blue Travel Flask (1.2L) Premium Leak Proof Insulated Tea & Coffee Flask, Hot & Cold Drinks, Built-in Cup, Twist-Pour Stopper, BPA-Free, Durable Steel

    9.9 Watertight
    9.9 Simple to use
    9.8 Durability

    Why we love it

    Keeps drinks hot or cold for 24 hours.
    Durable stainless steel construction.
    Convenient twist and pour stopper.

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Features

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Consumer Reviews

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Value for money

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When compared to other criteria, does the pricing seem reasonable? In order to provide genuine value for money, our team must answer that question with advanced calculations.