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18 oz Standard Mouth

$29.95
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Bottles

18 oz Standard Mouth

$29.95
Lifetime
  • Standard Mouth Flex Cap
$29.95
Quantity

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Ice. Water. Go.

Keeping your fluid intake on the upside is easy when you’ve got this portable travel buddy. Whether you’re headed to the gym or a quick jaunt across town, you can easily take your refreshment with you.

18 oz Standard Mouth Lifestyle Image

TempShield™

Our unique double wall vacuum insulation protects temperature for hours. Cold drinks stay icy cold and hot drinks stay piping hot so you can stay refreshed for any adventure.

TempShield

Pro-Grade Stainless Steel

Made with 18/8 pro-grade stainless steel to ensure pure taste and no flavor transfer - and the durable construction stands up for whatever life brings.

Pro-Grade Stainless Steel

Proprietary Powder Coat

Our proprietary powder coat means an easy-grip, sweat-free, and extra-durable bottle that you can take anywhere.

Cold Flow System
  • Lifetime Warranty

    Lifetime Warranty

    We stand behind our products.

    Hydro Flask guarantees this Hydro Flask product with a limited lifetime warranty against manufacturer defects.

Product Benefits

  • Ideal for pairing with our Standard Mouth Insulated Sport Cap for one-handed refreshment
  • TempShield™ insulation eliminates condensation and keeps beverages cold up to 24 hours or hot up to 12 hours
  • Durable 18/8 Pro-Grade Stainless Steel construction
  • BPA-Free and Phthalate-Free
  • Lifetime Warranty

Size & Dimensions

18 oz
Volume 532 mL
Mouth Diameter 1.91"
Diameter 2.87"
Height 8.7"
Weight 11.3 oz

TempShield™

Our unique double wall vacuum insulation protects temperature for hours. Cold drinks stay icy cold and hot drinks stay piping hot so you can stay refreshed for any adventure.

TempShield

Pro-Grade Stainless Steel

Made with 18/8 pro-grade stainless steel to ensure pure taste and no flavor transfer - and the durable construction stands up for whatever life brings.

Pro-Grade Stainless Steel

Proprietary Powder Coat

Our proprietary powder coat means an easy-grip, sweat-free, and extra-durable bottle that you can take anywhere.

Cold Flow System
  • Lifetime Warranty Icon
    Lifetime Warranty
    • Lifetime Warranty

      Lifetime Warranty

      We stand behind our products.

      Hydro Flask guarantees this Hydro Flask product with a limited lifetime warranty against manufacturer defects.

    Details & Specs

    Product Benefits

    • Ideal for pairing with our Standard Mouth Insulated Sport Cap for one-handed refreshment
    • TempShield™ insulation eliminates condensation and keeps beverages cold up to 24 hours or hot up to 12 hours
    • Durable 18/8 Pro-Grade Stainless Steel construction
    • BPA-Free and Phthalate-Free
    • Lifetime Warranty

    Size & Dimensions

    18 oz
    Volume 532 mL
    Mouth Diameter 1.91"
    Diameter 2.87"
    Height 8.7"
    Weight 11.3 oz

    Video

    18 oz Standard Mouth Promo Video
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    Reviews/Q&A

    • Reviews

    • Q & A

    • 18 oz Standard Mouth is rated 4.7 out of 5 by 474.
      Rated 5 out of 5 by from Perfect for the student I heard a lot of varying opinions about hydro flask, but I got one anyway. So happy! Keeps my water cold all day and hot chocolate warm in the winter. Only bad thing is it dents pretty easily and dirt sticks to it really easily. It still works very well though. So if you're looking for a good water bottle, go with HYDRO FLASK!!!
      Date published: 2019-12-11
      Rated 5 out of 5 by from Happiest birthday ever! This Hydro Flask was a birthday gift for my 12 year old granddaughter. Ella was thrilled! She wanted the olive green and I added the matching green top!
      Date published: 2019-12-07
      Rated 5 out of 5 by from amazing I got my water bottle last year, and it has no dents no cracks like my other water bottles do, and I really love my hydro flask.
      Date published: 2019-12-05
      Rated 5 out of 5 by from Perfect Fit for Mouth. Perfect Fit in Lunch Box. This is actually one of four Hydro Flasks I own which I am providing a review. The two most recent (includes the one being reviewed) are a perfect fit for my mouth and also fit very well inside my lunch box. Did I mention how cold (or warm) they keep the beverages? That part is perfect as far as I'm concerned. My other two Hydro Flasks travel with me on my motorcycle trips throughout the Southern US and cross country. Every Flask is quite durable and I have recently purchased 6 more as Christmas Gifts.
      Date published: 2019-11-29
      Rated 5 out of 5 by from She is so happy with her Hydro Flask! This Hydro Flask was a gift for my niece - SHE LOVES IT!! Exactly what she wanted!
      Date published: 2019-11-13
      Rated 5 out of 5 by from Boyfriend loves it I got this as a gift for my boyfriend because he’s always needing water at school. He’s obsessed with it and it’s really awesome!
      Date published: 2019-11-10
      Rated 5 out of 5 by from only water bottle i’ll ever need i bought this a month or two ago. it’s pretty great. it’s keeps my water cold for up to like 2 days. it’s expensive for good quality. would buy again
      Date published: 2019-11-09
      Rated 5 out of 5 by from Love it! Awesome product I bought a month ago & so far it’s really great product
      Date published: 2019-11-04
      Rated 5 out of 5 by from Does as intended It keeps my water cold all day and is the perfect size to carry around in my back pack when I’m out. Dents kinda easy but it doesn’t affect performance so who cares
      Date published: 2019-11-04
      Rated 5 out of 5 by from Great for school! I just bought this and the color is so nice and vibrant! It also keeps my water cold all day when in class! Just make sure not to drop it because it dents very easily!
      Date published: 2019-10-28
      Rated 5 out of 5 by from Keeps drink cold and easy to use. Our granddaughter playes Volleyball and need something that wouldn't leak and keep her drink cold . She loves it. Thank You for making such a great product. I would recommend this to all. Very happy to find one that works well for our athlete .
      Date published: 2019-10-21
      Rated 5 out of 5 by from Perfect size This is small but a perfect size to fit in my backpack side pouch.
      Date published: 2019-10-21
      Rated 5 out of 5 by from Frost Hydro Flask 18 oz I love this flask, it works really well keeping my water very cold.
      Date published: 2019-10-21
      Rated 5 out of 5 by from Keeps cool, No sweat This the second flask, the first was a gift the second for my wife, as soon as I started using it I was convinced that my Kleen canteen had to go, Hydro flask keeps liquids cold for long periods of time and it doesn’t sweat like other containers that I’ve tried, my wife loves it as well!
      Date published: 2019-10-14
      Rated 5 out of 5 by from Happy, Happy, Happy! I am extremely pleased with my purchased. I love the color, it’s the perfect size, and even one left in a hot car my water is still nice and cold.
      Date published: 2019-10-14
      Rated 5 out of 5 by from Easy/perfect Keeps water cold all day on golf course and is easy to carry
      Date published: 2019-10-11
      Rated 5 out of 5 by from love it I bought it for my daughter for school and she loves it. it keeps the water cold all day.
      Date published: 2019-10-09
      Rated 5 out of 5 by from Stay Hydrated Looks chic and keeps me hydrated ALWAYS!! Saw a friend with the same one so I copped one myself. I carry it with me literally everywhere and the water is always cold.
      Date published: 2019-10-09
      Rated 5 out of 5 by from Great size for running errands As a Florida resident, I follow the rule never leave home within water! This is the perfect size!
      Date published: 2019-10-07
      Rated 5 out of 5 by from Thanks for the quality I have heard great things so i bought two, one smaller and one larger. i am so glad i did.
      Date published: 2019-10-07
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    • Is the hydration bottle also good for coffee?

      Asked by: Madelyn1234
      Yes
      Answered by: Consumer Service
      Date published: 2019-10-29

      Would the water bottle fit in the fjallraven kanken 13 in waterbottle pocket?

      Asked by: volleyball4life
      This is not a question we can answer since that is not our product. We recommend you take your pack to one of our local retailers to test this for yourself!
      Answered by: Consumer Service
      Date published: 2019-10-27

      Can you put a sport lid on a 18oz?

      Asked by: yeetpayton
      yes you can buy a sport lid with this if you scroll down from the actual product or scroll up from the reviews you will see something called the standard mouth sports lid next to the blue hydroflask
      Answered by: skskvscosksk
      Date published: 2019-10-30

      what are the details on the lifetime warrenty?

      Asked by: raee
      The lifetime warranty covers manufacturers defects.
      Answered by: Consumer Service
      Date published: 2019-06-07

      Can we purchase a 18 oz bottle and have a straw lid as an option?

      Asked by: aed2018
      It would have to be the wide mouth flask. The straw cap will work with any of our wide mouth flasks.
      Answered by: Hydro Flask Customer Team
      Date published: 2019-09-10

      Can the hydro flex bottle fit in bicycle water gage?

      Asked by: Ernie
      Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
      Answered by: Hydro Flask Customer Team
      Date published: 2019-02-07

      Can you use a top made for hot beverages on the standard-neck water bottle?

      Asked by: hallie1
      The flip cap would not fit a standard mouth flask. The only two caps would be the sports cap and the standard mouth flex cap.
      Answered by: Hydro Flask Customer Team
      Date published: 2018-01-16

      I don’t see a gripping device or handle for carrying a flask while jogging. Have you thought about designing someway to grip a flask while jogging?

      Asked by: elmesquite
      We do not currently manufacture a product that matches your request, but we’ll document your suggestion for future consideration by our Product Development Team.
      Answered by: Hydro Flask Customer Team
      Date published: 2019-09-07
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    Size and Fit Chart

    Close
    Hydro Flask Pack Size Chart
    Available SizesS / MM / L
    Torso
    Measurement    		 18 - 19 in
    43 - 48 cm    		 19 - 22 in
    48 - 56 cm
    Hip
    Measurement    		 22 – 46 in
    56 – 117 cm    		 26 – 46 in
    66 – 117 cm

    1. Torso Measurement

      • Bring your chin to your chest and feel for the most prominent bony bump where the slope of your shoulders meets the back of your neck. This is your C7 vertebra, and the top of your torso measurement.

      • On each side of your body, feel for the top of your hip bones, just below the sides of your ribs. With fingers pointing forward and thumbs pointing backward, draw an imaginary line between your thumbs. This is the bottom of your torso measurement.

      • Stand up straight and have a friend with flexible measuring tape measure the distance between your C7 vertebra and the imaginary line between your thumbs. That’s your torso measurement. If you are between pack sizes, go with the smaller size.

    2. Hip Measurement

      While your torso measurement is the best indicator of your pack size, it’s still important to check your hip size when using a hipbelt. To find your hip measurement, wrap a flexible tape measure around the top of your hip bones, just below the sides of your ribs. This measurement is slightly higher than your waistline