Hydro Flask Standard Flex Cap Black 21 Oz

I like the quality build of this flask. The top fits well and does not leak. There are only two pieces, the flask and the cap, so nothing to fiddle with when cleaning the unit. It does a great job of maintaining the temperature of whatever I put in it. My only reservation is that the flask is a little heavy. I was accustomed to uninsulated plastic containers, with the added pack weight being primarily the fluid in the container. It didn't occur to me that an insulated metal flask might have an empty weight of 0.75 pounds empty, but it does. This may not matter for a casual trip, but for a backpacking excursion it does.I still really like the HydroFlask and plan to use it often. The product is well designed and built.

I've had many water bottles and flasks in the past, and I thought I would give this one a try since I've heard only good things from the brand. I got the 21oz size with a screw on top and I thinks it's a great size for short travels and such. If I were going on a hike or taking a longer trip, I would recommended getting a larger size. I really like the mouth, it's the perfect size and is comfortable to drink out of. It seems leak proof and it keeps your liquids cold for a while. I tested it since it claimed to keep things cold for 12 hours. I poured ice and water into it and left it sitting at my desk for 12 hours. It wasn't as cold as when I first filled it and all of the ice was melted after that long, but it still was a decently refreshing cold drink. I'm not sure how well it would do if left in a hot car, or left out in the summer but it would still keep things pretty cold for a handful of hours I'm sure. It gets a thumbs up from me. :)

My son absolutely loves his water bottle. So does my husband. I think I need to buy another soon. 😂 It keeps ice water cold for well over 12 hours. It's easy to clean, takes a beating, and easy to carry because of the handle. I don't think we're going to go to any other brand. We have coffee cups too. The customer service is fast and professional.

Love this bottle, it’s leak proof and value for your money

I own 4 of these and love them. One for the gym one for home and 2 for the go! Keeps liquid cold for a long time!!

I'm definitely a Yeti fan, but this bottle from Hydro Flask does give Yeti some competition. The dings would be I think it might actually get dinged if you drop it...it's not as durable as other reviewers have said. But lightweight is a nice trade off (Yetis can be on the heavy side). The plastic top is nice and it doesn't leak or sweat. The only thing I notice is you kind of have to learn how to properly drink out of it without spilling it on your clothes. Once you figure out that, you are fine. I would definitely buy it again and in different colors. It's a nice product overall.

Really nice

I got this for my daughter to take to camp. She said it kept her drinks cold all day and night. It doesn’t leak or have any other issues.