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Hydro Flask 18oz Wide Mouth Water Bottle

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70 Reviews


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
  • Item #HYF0015

Tech Specs

18/8 stainless steel
18 fl oz
Recommended Use
casual, hiking
Manufacturer Warranty

Tech Specs

  • Reviews
  • Q & A

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Great Water Bottle

  • Familiarity: I've put it through the wringer

One of the best water bottles around. Thermal action works great keeping things hot or cold. The bottle itself looks great and is durable. They keep coming out with sick colors.

Good for travel

  • Familiarity: I've used it several times

I love all my hydroflasks but my 32oz is bulky to carry around and fits in zero cup holders. This one fits in any bag/backpack and any cup holder. I always find myself getting dehydrated when travelling so this thing saves me. I got the baby clue color and it's adorable.

Perfect Size for Daily Coffee

  • Familiarity: I've put it through the wringer

I'm a huge coffee drinker and was looking for a thermos/hydro-flask size that would fit the bill. I would say the 18 oz is the perfect work day hydro-flask if you're in the market for it. At a little more than half a liter, it fits all the coffee I need for my daily work grind perfectly, with still enough room for cream and sugar.

I would highly recommend this size for hot and cold beverages of your choosing, but if you are deciding on a hydro-flask for water, I would suggest getting a bigger size instead.

True Hydro Flask Family!

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

Hydro Flask is slowly taking over our entire kitchen set up. I just purchased this size for my 4 year old son who always wants to drink out of our larger 40 oz hydro flasks, so we figured it was time he got his own in a perfect size for him to carry along! He absolutely loves it, and loves that it is green as well (his fave color!)

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.

    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.