Replacement Parts – ThermoFlask

Free Shipping Orders $49+ (U.S. Only)

Buy One, Get Customization Free On A Second Item!* Ends 9/2

*Offer valid from 8/29/25 through 9/2/25 at 11:59 PM PT. Buy one item with customization and receive free customization on a second item of equal or lesser value. Discount applies to customization charges only; product prices are not discounted. Limit 10 customized items per order. Only one side of customization is eligible for the discount per item. If both sides are customized, only one side will be discounted. Discount automatically applied at checkout. Offer valid only on purchases made at MyThermoFlask.com. Cannot be combined with other offers or discounts. No adjustments on previous purchases. Terms subject to change without notice.

16oz Sip-N-Lok™ Travel Coffee Tumbler O-Ring

16oz Sip-N-Lok™ Travel Coffee Tumbler O-Ring

Regular price $3.99

Regular price Sale price $3.99
Unit price per
Food Jar O-Ring

Food Jar O-Ring

Regular price $3.99

Regular price Sale price $3.99
Unit price per
32oz Straw Tumbler O-Ring and Gasket Set

Clear

32oz Straw Tumbler O-Ring and Gasket Set

Regular price $3.99

Regular price Sale price $3.99
Unit price per
Swivel Handle Straw Lid Breather Valve - Five Pack

Clear

Swivel Handle Straw Lid Breather Valve - Five Pack

Regular price $3.99

Regular price Sale price $3.99
Unit price per
Fixed Handle Straw Lid Breather Valve - Five Pack

Clear

Fixed Handle Straw Lid Breather Valve - Five Pack

Regular price $3.99

Regular price Sale price $3.99
Unit price per
Chug and Spout Lid O-Ring Set - No Tabs

Clear

Chug and Spout Lid O-Ring Set - No Tabs

Regular price $3.99

Regular price Sale price $3.99
Unit price per
Straw Lid O-Ring- Two Pack

Clear

Straw Lid O-Ring- Two Pack

Regular price $3.99

Regular price Sale price $3.99
Unit price per
Travel Mug Lid O-Ring and Sip Plug Set

Clear

Travel Mug Lid O-Ring and Sip Plug Set

Regular price $3.99

Regular price Sale price $3.99
Unit price per
Chug and Spout Lid O-Ring Set - With Tabs

Clear

Chug and Spout Lid O-Ring Set - With Tabs

Regular price $3.99

Regular price Sale price $3.99
Unit price per