Home / Thermos Funtainer review
Thermos Funtainer review
Thermos Funtainer 12 oz with Straw: a steel kids bottle with a covered pop-up straw and a push-button lid.
See Thermos Funtainer 12 oz with Straw on AmazonAmazon page
Rechecked 10/28/2026 by Jonah Beckwith
In one line
Grab it if you need a school bottle a young child opens with one press and that keeps water cold until lunch.
Look elsewhere if your child is old enough to carry 24 oz. The Owala FreeSip is a common next step.
What to know about the Thermos Funtainer
Twelve ounces is small on purpose. It fits a lunch box side pocket and a seven-year-old's hand. The pop-up straw is covered, which keeps lunch crumbs out of it.
Our scan of this model captured bullets only, so no weight or base is printed. Measure a lunch box pocket if you plan to use one.
A pack of four replacement straws appeared in the same scan, so spares exist. Plan to swap the straw when it gets chewed.
Sources: Listing text (Thermos)
Specs from the listing
| Lid | Push-button lid with covered pop-up straw |
|---|---|
| Size | 12 oz |
| Height | Not listed |
| Base width | Not listed |
| Empty weight | Not listed |
| Cold, maker claim | 12 hours |
| Dishwasher | Yes, hand wash advised |
| Bag safety wording | Leak proof when closed (listing) |
Listing scan 10/26/2026. Model number: not listed.
Living with it
Age and hands
The push button and the covered straw make it a kids bottle. Small hands open it without unscrewing anything, and the cover keeps the straw tip off lunch crumbs. Twelve ounces is small on purpose, so it does not drag a backpack down. Small is the point.
Spares and labels
Straws get chewed. A pack of four replacement straws showed up in the same scan, so that is a cheap fix. Label the bottle too: a pack of 136 waterproof name labels costs less than half the price of a new Funtainer, which makes it cheap insurance for a bottle that will be left on a bus at least once.
Cold only
The listing says up to 12 hours cold and not for hot liquids. That covers a school day from breakfast to pickup. Hot cocoa belongs in a food jar or a bottle rated for hot drinks, and on a winter morning that means a separate container in the lunch bag, since a straw would deliver hot liquid faster than a child expects.
Price check
Today's Amazon priceAmazon page
Common questions
Which bottle is easy for kids and will not leak in a backpack?
This is our kids pick. The lid opens with one press, the straw is covered and pops up, and the listing calls it leak proof when closed.
How this plays out across all 10Cheap fix: Waterproof name labels
Will it leak in my bag?
Leak proof when closed, per Thermos. Trouble usually starts when the lid gets pressed open inside a packed backpack, so teach the habit of closing it before it goes in.
Will the lid get moldy, and can I clean it?
The straw comes out for cleaning. Pull it daily, rinse it and push a thin straw brush through it once a week.
How this plays out across all 10Cheap fix: Bottle and straw brush set
Compare it with
Owala FreeSip 24 oz
Editor tested by CleverHiker (32 oz)
Covers the same job as the Thermos Funtainer with freesip spout: built-in straw plus open chug side, push-button lid with lock.
Today's Amazon priceAmazon page
Best overall: straw and chug in one lid. Full review
Takeya Actives 32 oz with Spout Lid
Specs from the listing
Takeya Actives: spout lid in place of a straw on the Thermos Funtainer.
Today's Amazon priceAmazon page
Best spout lid for the money. Full review
Stanley IceFlow 2.0 Flip Straw 30 oz
Specs from the listing
Covers the same job as the Thermos Funtainer with flip straw 2.0 twist-on lid with side clips.
Today's Amazon priceAmazon page
Best flip-straw bottle for the car. Full review
FAQ
How tall is the Thermos Funtainer, and how wide is the base?
No height or base came through in our scan of this listing. Before you buy a lunch bag around it, measure the side pocket and check the dimensions on the listing's detail page.
How much does the Thermos Funtainer weigh full?
No usable weight came through. With 12 oz of water inside, the water alone adds about 12.5 oz.
Can the Thermos Funtainer go in the dishwasher?
Thermos says dishwasher safe and BPA free, and also recommends washing by hand. The straw comes out, which makes hand washing quick.
Is the Thermos Funtainer worth it?
Yes, if you need a school bottle a young child opens with one press and that keeps water cold until lunch.
What should I buy instead of the Thermos Funtainer?
your child is old enough to carry 24 oz. The Owala FreeSip is a common next step.