All-For-Customization

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.

40oz Bottle With Spout Lid (2 Pack)

Ice Grey/Azure

Arctic/Grasshopper

Stone/Midnight

Onyx/Splash

40oz Bottle With Spout Lid (2 Pack)

Regular price $38.99

Regular price Sale price $38.99
Unit price per
40oz Bottle WithFour Lid Combo (2 Pack)

Ice Grey/Pine

Superior Blue/Mauve

40oz Bottle WithFour Lid Combo (2 Pack)

Regular price $42.99

Regular price Sale price $42.99
Unit price per
24oz Bottle With Spout Lid (2 Pack)

Mayan Blue/Black

Strawberry/Arctic

24oz Bottle With Spout Lid (2 Pack)

Regular price $35.99

Regular price Sale price $35.99
Unit price per
Bottle With Chug Lid and Straw Lid

Plum

Black

White

Capri

Cobalt

Bottle With Chug Lid and Straw Lid

Regular price $22.99

Regular price Sale price $22.99
Unit price per