What Is The Most Popular Hydro Flask Size? RANKED By Best Selling

If you're looking to buy a Hydro Flask it can be hard to know which size to get. You might be asking what is the most popular Hydro Flask size?

What size do most people get? Because if one size is super popular and most people get that size then chances are you'll be happy with that size too.

The most popular Hydro Flask size is the 32 oz Hydro Flask which is the best selling and most versatile size. This is followed in popularity by the 24 oz then 40 oz then 21 oz then the 12 oz Kid's Hydro Flask.

How Did I Work Out What The Most Popular Hydro Flask Sizes Are?

Hydro Flask doesn't release data on how many units of each size Hydro Flask they sell. Hydro Flask's parent company Helen of Troy doesn't even tell us Hydro Flask's annual revenues.

So to work out what the most popular Hydro Flask sizes were I used a combination of my own survey data, some customer interviews as well as a whole array of best seller lists from websites that sell Hydro Flask

More emphasis was placed on the results from high volume websites like Dicks Sporting Good and less emphasis on lower volume websites.

I couldn't use Amazon data because Amazon combines sizes so you can't get a best seller/most popular list for sizes of Hydro Flasks on Amazon. Hydro Flask Australia did allow you to do this, but the US and UK sites didn't.

At the bottom of the page your can see the resources, websites and e-commerce stores I used to gather my data and work out what the best selling and most popular Hydro Flask sizes are.

Make your vote below of what size Hydro Flask you are going to get (or already have) to see my survey data:

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1. 32 oz Wide Mouth Hydro Flask

Most Popular and More Versatile Hydro Flask Size

The 32 oz Hydro Flask size continually came up at the most popular size.

My own survey data showed this as the most popular size, comments online on places like Reddit showed this size being recommended more than any other size and high volume sites like Dicks Sporting Goods and REI as well as a few other sites placed this as the best selling Hydro Flask size.

The size is big enough that you don't have to fill up your water bottle many times during the day and some people don't need to refill it at all.

But it's small enough to handle and the powder coating gives you more grip.

My work colleague, who is a teenage girl, owns 2 of this particular size and I know that this size is popular among high school and university students. I own a smaller size, but I wish I had a 32 oz.

I am very confident that this is Hydro Flask's best selling and most popular size.

See the latest price of 32 oz Hydro Flasks at Amazon

2. 24 oz Standard Mouth Hydro Flask

Not too big, not to small, just right

This one actually shocked me because I didn't expect the 24 oz size to be the second most popular Hydro Flask size.

I figured more people would go for the wide mouth Hydro Flasks as you have more lid options but no I was wrong, the 24 oz seems to be extremely popular.

It ranked #3 in my own survey data at the time of writing and it consistently showed up among the most popular Hydro Flasks on multiple sites, most often ranking second behind either the 32 oz or another size like the 18 oz or 21 oz depending on the site.

I can see this thinner and more elegant size being popular among yoga and pilate going women as well as people who want the smaller mouth opening which is less likely to spill when you're drinking it.

See the latest price of the 24 oz Hydro Flask at Amazon

3. 40 oz Wide Mouth Hydro Flask

Great For The Big Drinker

The popularity of this large 40 oz size also surprised me.

The 40 oz Hydro Flask ranked #2 in my survey data and ranked #3 on a few different websites. Or if it wasn't #3 then it was consistently towards the top in the top 5 most popular Hydro Flasks.

This would be a great size for laborers and trades people who are taking water to work each day who sweat a lot and thus need to drink a lot. I can also see this being a popular size for truck drivers or people who spend a long time on the road.

It's also a good size for daily water intake for people who want to drink more water. In my article on how many Hydro Flasks should I drink a day I worked out that the 40 oz provides you with about 5 cups of water per day which is fine for most people.

See the latest price of 40 oz Hydro Flasks at Amazon

4. 21 oz Standard Mouth Hydro Flask

The 21 oz feels like a goldilocks size for me. I personally own the 18 oz and it's a little too small.

For a lot of people the 32 oz would be a bit too big. This is a good size for just an everyday water bottle.

It's still thin enough and not too tall that it would fit in most standard car cup holders and wouldn't be too heavy in people's back packs or tote bags.

This size ranked #1 on Hydro Flask's Australian website, 5th on Dicks Sporting Goods and actually ranked #1 on a variety of other smaller websites.

So there is a potential that this may be more popular than the #4 spot I have given it in this article.

See the latest price of 21 oz Hydro Flasks at Amazon

5. 12 oz Kids Hydro Flask

The 12 oz Kids size ranked pretty highly and I think this is largely due to the fact that it's the only Hydro Flask marketed specifically to kids.

I personally own one of these and bought one for my kids because it just made sense. “If you've got a kid buy the kid's Hydro Flask”.

It's also great that it comes with the protective boot as well as the straw lid.

My kids absolutely love this Hydro Flask and by the looks of it so do a lot of other kids around the world. It's no surprise that this bottle is in the top 5 most popular Hydro Flask sizes.

See the latest price of 12 oz Kid's Hydro Flasks at Amazon

6. 18/20 oz Hydro Flask

The 18 oz Standard Mouth and the 20 oz Wide Mouth are the smallest sized Hydro Flask bottles marketed specifically as a water bottle.

There are the 12 oz and 16 oz sizes but these are marketed specifically to coffee drinkers.

Some websites show the 18 oz being more popular than the 20 oz and other websites show the 20 oz selling better than the 18 oz. But they always seem to be close together on the list.

I personally own an 18 oz and my sister has the 20 oz. They are a great size water bottle for at home or at the office when you can easily refill your bottle if you need to. They aren't too big and bulky so I can see why they are popular.

See the latest price of 18 oz Hydro Flasks at Amazon

See the latest price of 20 oz Hydro Flasks at Amazon

7. 64 oz Wide/Growler

There seems to be a lot of people out there who like the huge size of the 64 oz Hydro Flasks. Either for beer in the Growler or for water in the Wide Mouth.

I can see why the growler is so popular as there aren't many beer growlers out there with vacuum insulation that will not only keep your beer fresh and carbonated but will also keep it cold.

See the latest price of 64 oz Hydro Flasks at Amazon

See the latest price of Hydro Flask Growlers at Amazon

8. 12/16/20 oz Coffee

The popularity of the coffee Hydro Flasks seems to vary from region to region with some websites ranking a certain sized coffee Hydro Flask really high while other websites show the coffee Hydro Flasks not being as popular.

The coffee Hydro Flask is the same width as the wide mouth Hydro Flasks but they come with a Flex Sip Cap which closes to become leak proof and twists opens so you can drink from the coffee spout.

Dicks Sporting goods put the 16 oz as the most popular coffee size followed by the 20 oz and then put the 12 oz as the least popular. Other websites put the 12 oz as the most popular.

So I'm not 100% sure which Coffee Hydro Flask size is the most popular. Click here to see the best Hydro Flasks for coffee.

But of all the Hydro Flasks I think this one really comes down to personal preference and how you like your coffee.

For me I like my coffee short and strong so they 12 oz is the best size for me. If you're someone who likes a very large coffee then a 16 oz or 20 oz may be better suited to you. You pick the one you like this best.

See the latest prices of Hydro Flask Coffee Cups at Amazon

9. 25 oz Wine Hydro Flask

The 25 oz Wine Hydro Flask is specifically designed to fit an entire bottle of wine in it.

It has a longer neck that other Hydro Flask bottles to make it more similar to a wine bottle and this also makes it easier to pour.

The lid has a rubber gasket making it water tight and leak proof so it keeps your wine fresher for longer. It also features Hydro Flask's vacuum insulation to keep your wine at the right temperature.

See the latest price of Hydro Flask Wine Bottles at Amazon

10. 32/24 oz Trail Series

The Trail Series by Hydro Flask is a newer range of Hydro Flask bottles that are designed to provide the same vacuum insulation to keep drinks cold/hot for long periods of time but they are designed to be lighter than traditional Hydro Flasks.

The 32 oz Trail weighs just 11.8 oz whereas the regular 32 oz Hydro Flask weighs 15.2 oz which is around 25% lighter.

They are still made from 18/8 pro-grade stainless steel making them durable and safe to drink from. But they also come in a bunch of cool brushed metal colors that regular Hydro Flasks don't come in and the shape is different.

They are taller and thinner than the regular Hydro Flasks.

See the latest price of Hydro Flask Trail Series at Amazon

Research Data For The Most Popular Hydro Flask

Below is a list of the websites and e-commerce stores I looked at to see what the best selling and most popular Hydro Flasks were.

HydroFlask.com.au Australia – Best Selling Hydro Flask Page

  • 21 oz Standard (on sale)
  • 18 oz Wide Mouth (on sale)
  • 18 oz Standard (on sale)
  • 24 oz Standard (on sale)
  • 64 oz Wide Mouth
  • 32 oz Wide Mouth
  • 12 oz Kids
  • 20 oz Wide Mouth
  • 64 oz Growler
  • 32 Wide Mouth (on sale)
  • 25 oz Wine Bottle (on sale)
  • 32 oz Trail Series
  • 24 oz Trail Series
  • 128 oz Oasis
  • 64 oz Oasis

DicksSportingGoods.com – Best Sellers Hydro Flask page

  • 32 oz Wide
  • 32 oz Movement
  • 24 oz Standard
  • 40 oz Wide
  • 21 oz Standard
  • 12 oz Kids
  • 18 oz Standard
  • 20 oz Wide
  • 64 oz Growler
  • 64 oz Wide
  • 16 oz Coffee
  • 20 oz Coffee
  • 25 oz Wine
  • 12 oz Coffee

Cotswold Outdoor UK – Best selling Hydro Flask page

  • 21 oz Standard (on sale)
  • 12 oz Coffee
  • 16 oz coffee
  • 18 oz Standard
  • 32 oz Wide
  • 40 oz Wide
  • 32 oz Trail Series

Well.co – Most popular Hydro Flask page

  • 12 oz Kids
  • 24 oz Standard
  • 21 oz Standard
  • 32 oz Wide
  • 40 oz Wide
  • 20 oz Coffee
  • 18 oz Standard
  • 16 oz Coffee
  • 12 oz Coffee
  • 20 oz Wide
  • 14 oz Mug

Altitude-Sports.com – Best selling Hydro Flask page

  • 32 oz Wide
  • 24 oz Standard
  • 21 oz Standard
  • 18 oz Standard
  • 12 oz Kids
  • 40 oz Wide
  • 20 oz Wide
  • 32 oz Trail Series
  • 24 oz Trail Series
  • 12 oz Coffee
  • 64 oz Wide
  • 64 oz Growler
  • 25 oz Wine

Bike24.com – Hydro Flask Popularity page

  • 21 oz Standard
  • 24 oz Standard
  • 40 oz Wide
  • 18 oz Standard
  • 32 oz Wide

NaturalNecessity.com.au.- Best selling Hydro Flask page

  • 18 oz Standard
  • 24oz Standard
  • 12 oz Kids
  • 21 oz Standard
  • 64 oz Wide
  • 32 oz Wide
  • 20 oz Wide
  • 25 oz Wine
  • 12 oz Coffee
  • 16 oz Coffee
  • 64 oz Growler
  • 64 oz Oasis

REI.com Best Selling Hydro Flask page

  • 32 oz Wide
  • 24 oz Standard
  • 32 oz Trail Series
  • 40 oz Wide
  • 12 oz Kids
  • 20 oz Wide
  • 24 oz Trail Series
  • 21 oz Standard
  • 18 oz Wide
  • 64 oz Wide
  • 64 oz Growler

NorthBeach.co.nz – Most Popular Hydro Flask page

  • 32 oz Wide
  • 21 oz Standard
  • 12 oz Coffee

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