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

I've been using this bottle for a few weeks now. It's a great size to not have to fill up too often and still fits in cup holder. The black color is sleek and it stays cold for a long time. Very durable and will be my daily bottle for the foreseeable future. I love that I can just throw it in a bag and not worry about it spilling.

Love this bottle's insulation. Hots stay hot and colds stay cold. The lid fits snuggly so there are no spills. It's easy to clean (no crevasses for mold to grow). All in all it's my go-to mug for work. So far the paint hasn't chipped which has been an issue for some of my other coffee tumblers.

I got my first Hydroflask bottle years ago and still love it as much as I did on day one. This new black bottle is super handy for whenever I go to a shared workspace nearby. It is light but super durable and keeps my tea warm/ iced tea cold. The size is perfect for my use, fits well into my backpack and bike bottle holder. I am a pretty clumsy person but the bottle holds up well and looks clean, no fingerprints no matter what.

I'm enjoying this travel flask. I brought it with me downtown for Valentine's Day and it held my beer without spilling. It's made of good quality material and a reputable company to purchase from. I recommend this product.

This bottle is great! I love the color and it keeps my drinks cold.

No complaints! This bottle keeps my drinks cold and is just the right size for me.

This was part of a bundle package for the Hydroflask. Each accessory was great for my hydroflask and made it that much easier to use on the go. The different colored straps helped me to accessorize it too!

I love this hydro flask for so many reasons. It keeps my cold drinks cold, my hot drinks hot and it looks super cool! It's also tough- I let my crazy 8 year old borrow it for school and he is pretty rough with his things. I knew the hydro flask could stand up to his wear and tear.

I use a water bottle every day and like to rotate through them. This is one of the nicest. It's excellent quality and keeps my water cold for a very long time. I'll be buying more in different sizes!!

I received this product in the mail and was delighted with the feel and the matte black color. I felt the strap was strong and sturdy and I wouldn't have problems with it in the future. The flask was able to keep my drink cold for approximately 20 hours. I've had several compliments on this product. I have given good reviews to whoever is asked about it. Would love to buy more in other colors.

Im very impressed with this bottle and believe me, I've been through quite a few. It does do exactly what it says it will do,it keeps my water cold for over 24 hours and it keeps my soups and coffee hot for over 13 hours. I love that it is made Bpa and toxin free. And this one I can throw it in my dishwasher! It has a nice feel to the outside of the bottle, it gives me a stronger grip to hold it.

So I'm a water bottle fanatic as I drink a gallon of water a day. That being said, I needed something smaller than my usual 40-64 oz bottles to keep my energy drinks cold at work and this ended up being perfect! It fits in my car cup holder with ease, no hassle to travel with due to the size & handle, and bonus it's obviously super cute. I'm happy to add this to my Hydro Flask collection.

This is one of the best quality bottle of water that I ever use! The cold drinks stay cold for a long time and the same with the warm tea. I definitely recommend it and I will buy one for my husband too!

I received the Hydro Flask and to me water bottles are just a water bottle. This is not your typical water bottle. I put coffee in it and rode my motorcycle in freezing temps. When I stopped to take a break my coffee was still hot. I got home and forgot to take it out of my bag. Next day I opened up the bottle to dump out my coffee and it was still really hot. I have not even put anything cold in it yet. But summer is on the way

My girlfriend hard one for ever and she bought me one over the summer. I loved it so much I have bought my brother-in-law one, my sister one, my girlfriend a new one, (her's stopped staying cold due to old age and abuse) and myself a larger one for coffee. An amaizing product.

I love this hydro flask. It is the perfect size for my car, easy to carry and keeps beverages nice and cold for hours. It is easy to fill because of the mouth size. I also like the color. It is also really easy to clean.

As expected, good product. Hydroflask is known for making a good product so expectations where and where met. They are also super durable - i've accidentally dropped it a few times already and it did not get dented. This is one of many Hydroflask products that we own. I use this daily at the gym. Excellent for keeping my protein blend cold. Sturdy, versatile and easy to carry. I would recommend this product with no reservations!!

This Hydro Flask is the best! It holds 21oz of any hot or cold liquid and keeps them hot or cold for hours. I love keeping my coffee in it as I know it will stay hot and fresh. It has a secure easy open lid and a handle which makes using it quick and simple. A big plus is that it is BPA free and dishwasher safe. I definitely recommend this fantastic product!

Absolutely love these bottles in every size! I have the 32oz bottles in 4 different colors and recently bought this 21oz for my brother and another for my mom. They love them! They keep your water cold and I use the coffee mug as well! Highly recommend.

I've been using this daily since I've received it to make iced coffees in. I love it! The ice cubes stay frozen for hours in it. I've literally forgotten it at home after I left for work accidentally & when I returned home the ice cubes were still cubes. Doesn't spill. I also like the little handle which you can put down to the sides. A great flask!

This Hydro Flask 21 oz standard water bottle is my new favorite drinking vessel. This bottle keeps my hot beverages hot and my cold beverages cold for an extended period of time. This bottle is easy to carry as well.

This is a nice bottle for the size. I've dropped on the ground a couple times and it doesn't break. It seems to keep the water very cold for long periods of time. I like the color a lot. I believe you can put all products in it but I haven't done that yet

It definitely Hydro Flask 21 oz Standard Mouth - Pacific exceeds my expectations, I take it everywhere, it keeps my drinks cold perfect when the weather in my state (Fl) is high or when the temperature drops these days, I use it for my coffee or hot tea, I drive for 40 minutes at my job and keeps the drink hot or cold, it came to my hands after looking for a bottle in different brands, it is resistant and very good quality, I have recommended it very well to my friends and family, they will have a bottle for a long time, awesome, i love it!!!

perfect for work, love the color!

This is by far my favorite beverage flask. I use it for hot and for cold drinks and it maintains the temperature for an adequate amount of time. I like that it is a 21-ounce size which gives me plenty of room to fill and take with me wherever I go. Best of all, is that it fits my hand and car cupholder. Overall, I give this Hydro-Flask 5 stars for design, color and temperature holding.