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Shop by Category

All Thermos Flasks

Personalised Thermos

Multi Packs Save Money

ThermoCafe By Thermos

Stainless King Range

Thermos Direct Drink Flasks

Thermos Food Flasks

Thermos Mugs & Direct Drinks

Cool Bags & Lunch Kits

Cool Boxes & Ice Packs

Hydration Bottles

Carafes & Servers

Bulk Buy - Box 12+

Thermos Spare Parts

Thermos Spare Parts

Flasksonline are the only retailer of genuine Thermos parts in the UK and offer as many spare parts as possible.
Due to their fragile nature Thermos do not supply replacement glass liners.
Each flask has a unique stopper and cup so please check carefully before ordering.
Thermos do not sell any replacement seals for any of their items, only the complete stopper

Everyday Steel Auto Stopper 0.35 and 0.5l sizes

Everyday Steel Auto Stopper 0.35 and 0.5l sizes

£4.95

free delivery

Everyday Steel Auto stopper 1.0l

Everyday Steel Auto stopper 1.0l

£4.95

free delivery

Twist and Pour stopper fits 0.35 and 0.5 sizes

Twist and Pour stopper fits 0.35 and 0.5 sizes

£4.95

free delivery

Twist and Pour stopper fits 1.0l

Twist and Pour stopper fits 1.0l

£4.95

free delivery

Mondial / Premier/ Weekend/ Eclipse Thermos Glass Lined Flask stopper

Mondial / Premier/ Weekend/ Eclipse Thermos Glass Lined Flask stopper

£4.95

free delivery

THERMOCAFE Multipurpose Flask Stopper - Batch PO87 & PO56 ONLY

THERMOCAFE Multipurpose Flask Stopper - Batch PO87 & PO56 ONLY

£4.95

free delivery

Ultimate 2 Part Stopper - Fits NEW 0.9L & 0.5L Flasks

Ultimate 2 Part Stopper - Fits NEW 0.9L & 0.5L Flasks

£5.95

free delivery

Thermos Work 1.2l or King 1.2l flask stopper

Thermos Work 1.2l or King 1.2l flask stopper

£5.95

free delivery

Thermos Stainless King 0.47L or Hercules Flask Stopper

Thermos Stainless King 0.47L or Hercules Flask Stopper

£5.95

free delivery

Rock Flask Stopper #650

Rock Flask Stopper #650

£5.95

free delivery

Light & Compact stopper fits 0.35,0.5 and 1.0L sizes

Light & Compact stopper fits 0.35,0.5 and 1.0L sizes

£6.95

free delivery

Stainless King Food Stopper with Spoon 0.47L

Stainless King Food Stopper with Spoon 0.47L

£6.95

free delivery

Paris Carafe stopper Black

Paris Carafe stopper Black

£4.95

free delivery

Paris Carafe stopper White

Paris Carafe stopper White

£4.95

free delivery

Thermos Filtration Bottle Cartridges - Pack of 2.

Thermos Filtration Bottle Cartridges - Pack of 2.

£9.95

free delivery

Thermos Stainless King Food Flask Cup Fits 0.47L and 0.71 L

Thermos Stainless King Food Flask Cup Fits 0.47L and 0.71 L

£4.95

free delivery

Thermos Light and Compact cup 1.0l

Thermos Light and Compact cup 1.0l

£5.95

free delivery

Thermos Light & Compact 0.35L & 0.5L Cup

Thermos Light & Compact 0.35L & 0.5L Cup

£5.95

free delivery

Thermos Rock 1.0l Flask Cup

Thermos Rock 1.0l Flask Cup

£5.95

free delivery

Thermos Ultimate 0.9L Cup

Thermos Ultimate 0.9L Cup

£5.95

free delivery

Thermos Ultimate Flask 0.5L Cup

Thermos Ultimate Flask 0.5L Cup

£5.95

free delivery

Thermos King Flask Cup 0.47L Size

Thermos King Flask Cup 0.47L Size

£5.95

free delivery

Thermos Stainless King Flask Cup 1.2L Size

Thermos Stainless King Flask Cup 1.2L Size

£5.95

free delivery

Thermos Work Flask 1.2l Cup

Thermos Work Flask 1.2l Cup

£6.95

free delivery

Thermos Hercules (Floating Flask) Cup

Thermos Hercules (Floating Flask) Cup

£5.95

free delivery

Thermos Spoon for Stainless King Food Flask

Thermos Spoon for Stainless King Food Flask

£5.95

free delivery

Replacement Lid for Food Flask with Microwaveable Container

Replacement Lid for Food Flask with Microwaveable Container

£5.95

free delivery

Thermos Stainless King Travel Tumblers and Mugs Replacement DrinkLock™ System

Thermos Stainless King Travel Tumblers and Mugs Replacement DrinkLock™ System

£7.95

free delivery

Thermos Direct Drinks Bottle Lid Stainless Steel

Thermos Direct Drinks Bottle Lid Stainless Steel

£6.95

free delivery

Discovery Flask 0.47L Cup White

Discovery Flask 0.47L Cup White

£5.95

free delivery

Discovery Flask 0.47L Black Cup

Discovery Flask 0.47L Black Cup

£5.95

free delivery

Mondial wide neck food flask stopper

Mondial wide neck food flask stopper

£3.95

free delivery

FUNtainer Lid & Mouthpiece Set Black

FUNtainer Lid & Mouthpiece Set Black

£5.95

free delivery

FUNtainer Lid & Mouthpiece Set Pink

FUNtainer Lid & Mouthpiece Set Pink

£5.95

free delivery

Replacement Mouthpiece for FUNtainer bottles

Replacement Mouthpiece for FUNtainer bottles

£4.95

free delivery

Replacement straws Intak 355ml - Pack 3

Replacement straws Intak 355ml - Pack 3

£3.95

free delivery

Replacement Straws Intak 530ml - Pack of 3

Replacement Straws Intak 530ml - Pack of 3

£3.95

free delivery

Replacement Straws - Pack of 3

Replacement Straws - Pack of 3

£3.95

free delivery

Straws for Flip Top Beakers pack of 3

Straws for Flip Top Beakers pack of 3

£3.50

free delivery

Hydro Active Sports Bottle Lid Pink

Hydro Active Sports Bottle Lid Pink

£3.95

free delivery

Hydro Active Sports Bottle Refill tube 450ml Pink

Hydro Active Sports Bottle Refill tube 450ml Pink

£2.95

free delivery

Hydro Active Sports Bottle Refill tube 700ml Blue

Hydro Active Sports Bottle Refill tube 700ml Blue

£2.95

free delivery

Hydro Active Sports Bottle Refill tube 700ml Charcoal

Hydro Active Sports Bottle Refill tube 700ml Charcoal

£2.95

free delivery