Hydro Flask40 Oz Wide Flex Straw Cap

4.3 (772)

Our Wide Mouth bottles and our insulated, leakproof Flex Straw Cap are the perfect pair. Easy to open and close. Smooth to sip. Easily enjoy cold hydration anywhere.

Product Features
- TempShield double wall vacuum insulation keeps contents cold up to 24 hours
- Insulated Flex Straw Cap is leakproof when closedMade with 18/8 pro-grade stainless steel for durability, pure taste and no flavor transfer
- Wide Mouth opening is ice cube friendly
- Lifetime
- Color Last powder coat stays clean and colorful
- Bottle fits most backcountry water filters
- Dishwasher safe
- BPA Free
- Flex Straw Cap not intended for use with hot liquids
- Not for use on a stove, in a microwave or freezer
- Bottle fits all Wide Mouth caps and lids
- Steel
- Imported
Shipping & Returns
- This item qualifies for Free Shipping with minimum purchase! exclusions & details
- California and Minnesota customers call 1-800-289-6229 for Free Shipping information.
- For complete details, see our Shipping and Returns policies.

Ratings & Reviews

4.3/5

772 star ratings, 770 reviews

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6 days ago

LOVE my Hydro Flask

I love this water bottle. It keeps ice overnight and is so easy to maintain! Keeps me going all day and helps me keep up the right amount of water intake.

Customer review from hydroflask.com

11 days ago

Hydroflask with straw

Good bottle but definitely needs to be cleaned often and does leak occasionally

Customer review from hydroflask.com

20 days ago

Great bottle

This summer I’ve really appreciated the ability of this bottle to keep my water cool in hot weather. The straw cap is easy to take apart and wash.

Customer review from hydroflask.com

1 month ago

Good Water Bottle

I keep upping the size of my Hydroflasks as the hot weather makes more and more water necessary for my daily walks. The 40 oz just about does it and I was able to use the sling from my 32 oz. , still not too heavy to carry around. I prefer Hydroflask to Yeti - the Yeti I bought just didn't keep the water cold long enough. I would not say the Hydroflask is exceptional either on that score, but I think it does a better job.

Customer review from hydroflask.com

1 month ago

Love!

The best double wall insulated water bottles. Doesn't leak and I am comforted knowing that these are lead free!

Customer review from hydroflask.com

1 month ago

It’s alright

Bottle is good but it actually leaks which is crazy for the price

Customer review from hydroflask.com

1 month ago

Disappointed in ability to keep ice or water cold for long periods

Beautiful bottle but unfortunately does not keep ice cold. I can put at least 5 ice cubes in water and about 3 hours later they are almost completely melted. And it’s completely room temp the next day.

Customer review from hydroflask.com

1 month ago

Good bottle

Keeps my ice water cold for 1 1/2- 2 days. I love that. But the outside of bottle scratches every easily. Picture is after just 2 days of use. For the price i thought it would be more durable on the outside.

Customer review from hydroflask.com