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Hydro Flask
21oz Standard Mouth Trail Lightweight Flex Cap Water Bottle

4.590909090909091 out of 5 stars
110 Reviews

Out of Stock

Don't worry though, we have a lot more Water Bottles in stock than that.

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Why We Like The 21oz Lightweight Trail Series Bottle

Delivering the same cold beverages we've come to expect from Hydro Flask while dropping a portion of weight compared to similar models, the Lightweight Trail Series bottle was designed for the long-haul. Though the walls are thinner and lighter than ever before, the pro-grade stainless steel material ensures a super sturdy design for rugged adventures while the leakproof cap uses aluminum pivots and a perforated strap for extra weight cut.


Details

  • Lightweight wide mouth water bottle for any adventure
  • Stainless steel walls reduce overall weight
  • TempShield insulation maintains temperature and stops condensation
  • Flex cap offers leakproof seal with easy-grab handle
  • Item #HYFZ02R
Material
18/8 pro-grade stainless steel
Volume
21oz
Lid
wide mouth
Manufacturer Warranty
lifetime

Overall Rating

4.5 based on 110 ratings

Review Summary

1 Stars - 6 reviews
2 Stars - 3 reviews
3 Stars - 2 reviews
4 Stars - 8 reviews
5 Stars - 91 reviews

Fits True To Size

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?

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3 out of 5 stars

May 12, 2024

Soft-shell

[This review was collected as part of a promotion.] The outer shell on the bottle is too easily dented - after just a week my daughter’s bottle topples over because of dents to the bottom. Otherwise the bottle is fine, and keeps iced water cold all day.

user image
Nathan D.
hydroflask.com

Originally reviewed on hydroflask.com

1 out of 5 stars

May 8, 2024

Unsatisfied

[This review was collected as part of a promotion.] I was not send my flask and send out an email days later that my flask was not available? However it was back on your site to be sold again within few days ? Why was I not send mine and why was there no apologies or promise to have my flask send to me when it’s returned back in stock ?

Sanam L.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

April 21, 2024

It's great!

[This review was collected as part of a promotion.] All around a great water bottle! I love the colors (I ordered the Obsidian one). The lip of the water bottle is super smooth. I don't know why I expected differently, but it's great. The size and shape is very efficient as well. I use mine almost exclusively for work, so I just toss it in my backpack and because it's shaped similar to a plastic water bottle, it fits efficiently for how I use it. If there was a negative, opening and closing the bottle isn't effortless. The o-ring is substantial and you'll never get a leak, but that also means it may require more force to open and close it. Also, opening and closing it is a little awkward, in that the cap is narrow and awkward to grip. At the end of the day, it's a water bottle and does that job quite well! I would recommend this product!

Zach J.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

April 20, 2024

Perfect for hiking

[This review was collected as part of a promotion.] Love the lightweight construction and it keeps liquids cold as long as the standard construction. Nice and slim for a side pocket on a backpack. I purchased the Obsidian color and it's beautiful.

Janet H.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

April 16, 2024

The ideal water bottle

The color is beautiful and bright. I also love how light weight it is. Versatile for anything.

Ashley H.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

April 10, 2024

The best

[This review was collected as part of a promotion.] Beautiful color and my daughter loves it, gets a lot of compliments

Lindsay G.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

March 29, 2024

Love them. Keeps my water

[This review was collected as part of a promotion.] Love them. Keeps my water cold all day. Thank you!

Amy E.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

March 26, 2024

Love it!

[This review was collected as part of a promotion.] Perfect size and great quality. No more plastic bottles!

Judy A.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

March 18, 2024

Does exactly what I bought

[This review was collected as part of a promotion.] Does exactly what I bought it for. Stays cold and isn’t heavy for days I have to carry it in my purse to the office.

Maria M.
hydroflask.com

Originally reviewed on hydroflask.com

5 out of 5 stars

February 23, 2024

Hydro flask

[This review was collected as part of a promotion.] It keeps my drink super cold while working out. It’s sleek and easy to carry. Love luv love it !

Shawn G.
hydroflask.com

Originally reviewed on hydroflask.com