18oz Wide Mouth Water Bottle

Hydro Flask's insulated, stainless steel 18oz Wide Mouth Water Bottle is ideal for anything from warm hikes to cold ski tours, and especially hot yoga classes. TempShield technology keeps water ice-cold for up to twenty four hours, and it keeps hot drinks toasty for up to six hours. Hydro Flask updated this year's model with a flexible loop on the wide mouth cap for long-lasting convenience.

  • Pro grade stainless steel
  • TempShield double insulation
  • Flex cap
  • BPA-free
  • Reviews
  • Q & A


  • Familiarity: I gave it as a gift but have feedback to share

It is great it keeps things nicely chilled all day long.


  • Familiarity: I've put it through the wringer

Keeps soup hot and lemonade chilly. Absolutely love it.

Best Gift

  • Familiarity: I've put it through the wringer

I love my Hydro Flask and use it every day! I gave several of these out during the holidays knowing that my family would love them as much as I do!

Great Gift

    I purchased 3 of these for the kids in my family for Christmas. They fit perfectly into their backpacks and encourage them to keep hydrated throughout the day because the water stays cools and you can add the flip top straw. This is a must have for any school aged kid.

    Best water bottle

    • Familiarity: I gave it as a gift but have feedback to share

    I have grown to love hydroflask containers over the years. I have quite a few pint glasses, rocks glasses, a growler, and a few of these 18oz bottles. Each one is amazing and does not dissapoint. Your cold beverages stay cold, ice takes longer to melt, and your hot drinks will stay warm for you to take your time to sip and enjoy.

    The most convenient size

      Perfect size water bottle for your constant hydration, or sipping coffee on the go. Fits anywhere you wanna stash it and Isn't as clunky as the larger sizes

      Why buy other brands?

        This is a great gift for almost anyone in your family. I've got multiple hydro flasks and I can say that the wide mouth is easily one of my favorites.

        I will say I spill ice all the time when its filled to the brim but there's no way to go around that besides getting a straw cap. The only downfall might be that I can't fit the bottle in my car holder, but again this is understandable because of the wide mouth lid.

        Takes a beating

          It can take a beating and still keep your coffee hot.

          Love these!

          • Familiarity: I've put it through the wringer

          I own several in different colors - they are great for keeping drinks hot or cold - summer car travel, tea while skiing...and very sturdy and dependable. When I throw a water bottle into my bag or pack I need to know it won't leak! These come through with flying colors :)

          Lasts forever

          • Familiarity: I've put it through the wringer

          Great for travel and can keep your drinks hot or cold for a whole day with no problem.

          Awesome Bottle

            Works as described. Keeps liquids cold or hot for hours.

            Good bottles

              I've got a handful now, so I must like them.

              Another one

              • Familiarity: I've used it several times

              Had to get yet another size in the Hydroflask. This one is perfect for my water at work and awesome for taking the dog out for a hike.

              Great Bottle

              • Familiarity: I've put it through the wringer

              I have a few of these in different colors and just like most reviews on this, they just work. Excellent choice for drinks on the go and are very durable.

              Love the Hydro Flasks

                I bought this one for my wife and turned around and bought another one for the kid. They both like the flip up straw lid and I prefer the flip top. Any of the wide mouth lids will work with it.


                  These just work, no complaints, use this size for travel.


                  • Familiarity: I've put it through the wringer

                  es el mejor thermo que he comprado en mi vida!

                  So Many Fun Colors!

                  • Familiarity: I've put it through the wringer

                  I gave this as a gift to a friend. Here's what he has to say:

                  "Having a water bottle that is durable, keeps things cold or hot all day long and doesn't sweat is very important in the medical field. Hydro Flask is that water bottle. I can put ice in it at 6AM and by middle of the afternoon I'm only refilling water and not the ice. I've been able to keep coffee hot a for 12 hours. It's truly the most versatile water bottle and it also comes in all sorts of fun colors."

                  Pure Awesomeness!

                  • Familiarity: I've put it through the wringer

                  We use these for everything! I think we are going to replace all the cups/ drinkware in the house with hydro flasks.

                  -Glass of warm milk on the go.. sure grab the Hydro flask!
                  -Beer? What’s in here ice cool PBR or Hoptimus Prime? It doesn't matter when it’s in Hydro flask duh...
                  -Mixed drinks? johnny walker on the rocks? homemade potato vodka? And even Mimosas... Yep whatever bro it’s going in the hydro flask.
                  -Coffee? 3 day old by the camp fire brewed dirty engine oil black MJB that tastes almost certainly as if it was filtered with a dirty old sock, or your Grande, iced, sugar-free, vanilla Latte with soy milk and caramel drizzle? Yeah man put it in the Hydro flask.

                  EWWW GROSS!! What is that clear stuff he is drinking? Some sort of energy drinking or something? Yep just the best energy drink on the planet... Did you know that you can even put water in these things?!? It’s fantastic!

                  Yep I can see it now; I will have all the kitchen cabinets full of them soon. You know you can even eat soup and ramen noodles from these.

                  Only The Best

                  • Familiarity: I've put it through the wringer

                  Perfect for car travel to social hangouts, great for everyday use! Its nice to drive a few hours reach for a drink and still have something Ice Ice Cold!