Customer Reviews Hydro Flask 21 oz Standard Mouth with Standard Flex Cap

As an environmental conscious person who lives in the humidity of Arkansas, it is important to me to have a refillable bottle to carry water so that I can stay hydrated in the heat while on the go. This product is perfect for this. I love the color of this bottle. Even better than the color is the bottle's ability to keep my drink's not only cold, but also hot. This product has amazing insulation and is of great quality. I will definitely purchase again in the future and would recommend to anyone who is looking for a refillable bottle.

I love this hydro flask it's amazing. Definitely works as advertised. I used it for the first time this weekend and my drink stayed cold for 24 hours maybe even a bit longer. Will definitely recommend to others and will purchase again.

Put ice & cold water in it in the early morning. Still have cold water & some ice by late evening.

It is great. Performs just as designed. Light and convenient

I bought this for my cousin for Xmas. He loved it and it was exactly as pictured and expected!

Lightweight, perfect size and easy to wash! We bought 6 of them...

I purchased this size because my 32 oz stretches my backpack pockets and is so heavy when I go hiking. This is the perfect size for cup holders and backpack side pockets!

I love it! Water stays cold and it doesn't taste like metal even after sitting for hours.

I received my Hydro Flask bottle and I absolutely love it. It really keeps your drinks cold for multiple hours. Also got extra straps to change out and add a personal effect to. That also makes it fun and interesting. I recommend giving this product a try for yourself!

I love my new 21 oz Hydro flask. I've been wanting one for a while and finally have one that I can't put down! It travels with me between work and home so it's proven how sturdy and resilient it can be. It is very easy to clean and keeps my beverages at temperature for a very long time.

I bought this bottle for my 13yr old daughter to use for de-tasseling ( if you are not from the Midwest google it). That was 8 years ago. 5 seasons of detasseling, 4 years high school, 3 years college. We are talking thousands of hours and miles. She hasn't been a day without it in all that time. It goes to work, class, dozens of show choir trips, vacation, hiking, the gym, etcshe says she is finally ready for a new one so here I am. She's 21 now and she should by her own but since this will be only the second one I bought, why not! Buy the Bottle I promise you will get your moneys worth!

I got this about a month ago. I love using hydro flasks as they always keep my drinks cold for the day. I've used it to keep hot cocoa hot for the kids as we live in upstate ny and winters are rough. I love that they are sold different sizes.

The Hydro Flask 21 oz Standard Mouth is the perfect size for travel, fits in back packs and cup holders. I love that the Standard Mouth is able to be customized with different reversible Flex Strap Packs and the Flex Strap Customizer. The TempShield insulation eliminates sweat on the bottle and keeps drinks hot or cold for hours. I love this new edition to my Hydro Flask family, quality is always amazing!

Whether I am going to the gym or going to work my Hydro flask if going along. It's great for hot drinks as well as cold drinks. Definitely recommend. I never leave home without it. I keep telling everyone at work that they need to get one as well.

Whether I want to keep my coffee hot or my ice water freezing cold I can count on this 21 oz Hydro Flask to do both. I love the black color because it is my go to color for pretty much everything. It fits great in my truck cup holder when I'm on the road. It keeps my coffee hot and fresh for hours which helps to get me going for my day. I drink ice cold water after I finish my coffee and it keeps my water cold for hours as well. You can't go wrong with this and I think it is a great product and has an excellent affordable price.

I love this hydroflask bottle! I take it everywhere with me. I use it for my water and for my protein drinks. Not only that, I also sometimes use it for my baby's formula! It keeps it nice and warm if we go anywhere that I can't mix up formula and heat it. So convenient!

This is really the best. It looks really nice and it keeps the drinks hot / cold for a long time. Very easy to clean and wash. No leaking at all, it is insulated really well. I like the way it looks , very sleek and modern.

Really nice water bottle. Lasted all day and kept refilling it with water a work and my ice didn't melt which was even better. Must buy perfect for gym visits as well. Nice black color easy to clean as well.

I snagged the Hydro Flask 21 oz Standard Mouth Water Bottle for my hubby! He loves it cause he can put his apple juice and tea in it without worrying about that metallic taste that can happen! Perfect sized for him and easy to carry along with all his other teaching supplies! The cold lasts long, fill it in the morning and it's still cold at the end of the day!

The hydrolysis 21 ounce water bottle is a great water bottle. The black color fits with anything and this bottle keeps drinks both warm and cold. The perfect water bottle for the gym or hiking. This is easy to clean and very durable.

Great bottle, super durable. Keeps water cold all day. Would definitely recommend.

I had heard of the Hydro Flask before owning one, but I did not know how much I would like it. Not only is it super stylish, but it is very easy to use and to clean. Pair a Hydro Flask with additional straps and you can drink water in style for any occasion.

I really like how long this keeps my water cold or coffee hot all day long for me...Made of stainless steel and I love that it's easy to grip. This is going to be great to take hiking this summer..I'll probably buy more since their all trying to take mine. lol

This 21 ounce hydro flask is perfect!! I love that it keeps my cold drinks cold and my hot drinks hot for hours! It is the perfect diameter for my hand grip and fits great in any standard cup holder. It comes with a sturdy strap which makes it so convenient to carry anywhere or hook on to a stroller. The screw-on cap makes it absolutely spill proof!

I love this hydro flask. I use it on all my hiking trip. I like the standard mouth opening because it makes it easier to use. I also use it to keep water warm for my son's bottles. So it's definitely a multi-use flask.