18oz Wide Mouth Flex Straw & Boot - Kids'
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Quantity
Hydro Flask 18oz Wide Mouth Flex Straw & Boot
Our kid’s 18 oz stainless steel water bottle is the perfect insulated bottle for school, family hikes and everyday hydration. The straw cap makes sipping easy, and the double-wall stainless steel construction keeps cold drinks cold for up to 24 hours.
Details
- Item #HYFZ04W
- Material
- stainless steel
- Volume
- 18oz
- Lid
- screw-on carrying handle
- Valve
- flip-up straw
- Dimensions
- [H x D] 9.1 x 2.9in
- Claimed Weight
- 11.2oz
- Activity
- casual
- Manufacturer Warranty
- limited lifetime
Reviews
Q&A
What do you think about this product?
Overall Rating
4.5 based on 574 ratings
Review Summary
Customer Images
Here's what customers have to say
The 18oz kids water bottle is well-received, with customers praising its size, color options, and ability to keep drinks cold. Many parents report their kids love the bottle and it encourages them to drink more water. However, some customers have experienced issues with leaking, rusting, and defective bottle boots. A few reviewers also felt the quality has decreased compared to previous models. Overall, the water bottle seems to be a popular choice for active, hydrated kids.
AI-generated from the text of customer reviews.
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Selecting an option will reload the available reviews on the pageSeptember 1, 2025
Straw doesn’t stay in place
[This review was collected as part of a promotion.] The straw on the lid does not stay in place. It moves while you are drinking, and then liquid does not come out.
Originally reviewed on hydroflask.com
August 31, 2025
Dented with first drop
[This review was collected as part of a promotion.] I’ve tried lots of different brands of insulated cups and I’m sad to say this one was dented after just 1 day when my baby knocked the cup over. I’m pretty tough on my tumblers of other brands and none of them have dented so easy.
Originally reviewed on hydroflask.com
August 31, 2025
Hydro flask
[This review was collected as part of a promotion.] Wide mouth flask is great slim fit to fit in my sons side backpack and the 12oz is non leaking for my 3 year old daughter and of course it keeps cool throughout the school day
Originally reviewed on hydroflask.com
August 28, 2025
Lots to like but one major flaw
[This review was collected as part of a promotion.] Love the size of this cup and typical HF quality. It's the perfect size because it is one of the few insulated cups that fits in our daughters two different car seat cup holders. Great that you can clean the entire thing thoroughly. Biggest downside - the straw configuration! In theory - it's great because it's easy to clean everything. The downside, when our 2-yr-old daughter is walking around or pulling it out of her carseat cupholder, she'll often grab it by the straw and the whole straw setup pulls out of the lid and the cup falls and spills everywhere. 5 stars for size/quality 2 stars for straw issue - what happened in R&D for a kids cup?!
Originally reviewed on hydroflask.com
August 27, 2025
Lid color
[This review was collected as part of a promotion.] Why would you put a pink lid on the red bottle? Boys don’t want a pink lid! Why can’t you have the lid color match the color of the bottle?
Originally reviewed on hydroflask.com
August 27, 2025
Kids
[This review was collected as part of a promotion.] They are super cute but they leak! Having kids you can’t have them leak.
Originally reviewed on hydroflask.com
August 27, 2025
100% No Leaks
[This review was collected as part of a promotion.] This water bottle is amazing. Seriously doesn’t leak. Easy to clean and assemble. We don’t put ours in the dishwasher so that’s a huge time saver for us to easily break down and assemble. The kiddos take their bottles everywhere. We are really happy with our purchase.
Originally reviewed on hydroflask.com
August 27, 2025
Doesn’t leak!
[This review was collected as part of a promotion.] I’m extremely pleased. Looks beautiful and doesn’t leak.
Originally reviewed on hydroflask.com
August 26, 2025
great kids bottle
[This review was collected as part of a promotion.] This bottle is the perfect size for my 2 year old niece loves it and brings it everywhere with her. she also loves her name engraved on it
Originally reviewed on hydroflask.com
August 26, 2025
Wonderful!
[This review was collected as part of a promotion.] Great for our 2yos and 4yo. They can open them independently and are easy to clean
Originally reviewed on hydroflask.com
Do you have a question about this product?
November 20, 2022
Hello, we bought two of these bottles for our boys about a year and a half ago. The gray silicone part on one of the lids fell out. Is it possible to purchase a replacement for this part? Thank you
Originally reviewed on hydroflask.com
June 29, 2022
Is peony red or pink?
Originally reviewed on hydroflask.com
February 1, 2022
Hi! I purchased this bottle and the little gray (silicone?) part that prevents spilling has come out. Is it possible to get a replacement of this part? We LOVE this bottle and are so sad this piece is gone!
Originally reviewed on hydroflask.com
August 18, 2021
I would like to buy a replacement straw for this water bottle. Do you sell them?
Originally reviewed on hydroflask.com
July 31, 2021
Does the straw lid have an actual straw that extends down into the bottle, or is it just an extension off the top?
Originally reviewed on hydroflask.com
July 22, 2021
Kind of silly but what is best to write their name with on the tag? I used a sharpie but it rubbed off turning it black (talk about disappointed kids). Then a pen over that but same thing. Thanks!
Originally reviewed on hydroflask.com
June 18, 2021
I bought a kid's wide mouth by accident, didn’t look at details, says not for hot beverages…any reason it can’t be used by adult for hot drinks with wide mouth flex sip lid?
Originally reviewed on hydroflask.com
June 7, 2021
Is this good for a toddler to drink milk out of?
Originally reviewed on hydroflask.com
May 7, 2021
How do I order replacement lids for the kid size bottle?
Originally reviewed on hydroflask.com
April 5, 2021
Do you sell replacement pieces? The top of my kiddos water bottle was chewed, and I'd like a new one.
Originally reviewed on hydroflask.com
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