It can be really difficult to decide on what type of Hydro Flask to get. There are so many different sizes and there is also the choice between a standard mouth and a wide mouth bottle plus don't even get me started on the color combinations you can choose.
There are 15 different sizes of Hydro Flask bottles (not including the lightweight series) and these range anywhere from 12 oz (355mL) to 128 oz or 1 gallon (3.79 L).
Smaller sizes are more lightweight and portable and can more easily fit in your bag or in the cupholders of your car. The larger sizes are wider and heavier and less practical to carry around but you don't have to refill them as much making them better for some people.
Choosing The Right Color Is Also Important
If you thought choosing a size was hard, choosing the right color for you can be even harder.
You've got 11 different colors plus 2 kids colors plus limited edition and discontinued colors. It can be really difficult to work out what color best suits you.
That's why I've also created this quiz for choosing which color Hydro Flask you should get.
You can also check out this article on the best Hydro Flask colors for more information about what colors tend to suit what people.
This Quiz Will Help You Choose The Right Size For You
Ultimately you need to pick the right size that suits you.
The below quiz will help you to narrow down exactly what size Hydro Flask you should get by a process of elimination.
Please NOTE: Product links in the below quiz are Amazon affiliate links. This means I earn a small commission from sales at no extra cost to you.
1. Will You Be Using This Hydro Flask For Yourself or For Multiple People?
A) Myself – GO TO QUESTION 2
B) Multiple People – GO TO QUESTION 10
2. What Kind Of Drink Will You Be Putting In Your Hydro Flask?
A) Water – GO TO QUESTION 3
B) Coffee – GO TO QUESTION 11
C) Soda – GO TO QUESTION 3
D) Wine – YOUR PERFECT HYDRO FLASK IS THE THE 25 OZ WINE BOTTLE
E) Beer – YOUR PERFECT HYDRO FLASK IS THE 64 OZ GROWLER
3. What Age Are You (Or The Person You're Buying This For)
A) Under 8 – YOUR PERFECT BOTTLE IS THE 12 OZ KIDS BOTTLE
B) 8-12 – GO TO QUESTION 4
C) Over 12 – GO TO QUESTION 5
4. Do You Play A Lot Of Sport?
A) None, I HATE Sport – GO TO QUESTION 5
B) A bit – GO TO QUESTION 5
C) Lots, I LIVE for Sport – YOUR PERFECT BOTTLE IS THE 32 OZ WIDE MOUTH
5. How Much Water Do You Generally Drink Each Day? (Or Want To Drink)
A) Less than 2 cups (<16oz or <0.5L) – GO TO QUESTION 6
B) 2-4 Cups (16-24oz or 0.5-1L) – GO TO QUESTION 7
C) 5-6 Cups (40-48oz or 1-1.5L) – GO TO QUESTION 7
D) 7-8+ Cups (64oz+ or 2L+) – GO TO QUESTION 12
6. Choose What Is Most Important To You
A) Fitting in a cup holder – YOUR PERFECT HYDRO FLASK IS THE 18 OZ STANDARD MOUTH
B) Being able to have a straw lid – YOUR PERFECT HYDRO FLASK IS THE 20 OZ WIDE MOUTH
7. How Often Do You Want To Refill Your Hydro Flask
A) Once at the start of the day then not again till tomorrow – GO TO QUESTION 9
B) Refilling once is fine, but it's easier not to – GO TO QUESTION 8
C) I have easy access to cold water so refilling in easy – GO TO QUESTION 6
8. Do You Need Your Hydro Flask To Fit in a Cup Holder?
A) Yes – YOUR PERFECT HYDRO FLASK IS THE 24 OZ STANDARD MOUTH
B) No – YOUR PERFECT HYDRO FLASK IS THE 32 OZ WIDE MOUTH
9. Is Space or Weight An Issue For You
A) Yes, the more compact the better – YOUR PERFECT HYDRO FLASK IS THE 32 OZ WIDE MOUTH
B) No, bigger is better – YOUR PERFECT HYDRO FLASK IS THE 40 OZ WIDE MOUTH
10. How Many People Will Be Using This Bottle For Water
A) 2 People – YOUR PERFECT HYDRO FLASK IS THE 40 OZ WIDE MOUTH
C) 4 or more People – YOUR PERFECT HYDRO FLASK SIZE IS THE 128 OZ OASIS
11. What Size Coffee Do You Like To Drink?
B) Tiny (Piccolo or Cortado for me) – YOUR PERFECT HYDRO FLASK IS THE 10 OZ ROCKS
A) Small-Medium – YOUR PERFECT HYDRO FLASK IS THE 12 OZ COFFEE
B) Large – YOU PERFECT HYDRO FLASK IS THE 16 OZ COFFEE
C) Extra Large – YOUR PERFECT HYDRO FLASK IS THE 20 OZ COFFEE
D) Massive Jumbo Giant Huge – YOUR PERFECT HYDRO FLASK IS THE 32 OZ WIDE MOUTH
12. How Often Do You Want To Refill Your Hydro Flask
A) Once at the start of the day then not again till tomorrow – YOUR PERFECT HYDRO FLASK IS THE 64 OZ WIDE MOUTH
B) Refilling once is fine, but it's easier not to – YOUR PERFECT HYDRO FLASK IS THE 40 OZ WIDE MOUTH
C) I have easy access to cold water so refilling in easy – YOUR PERFECT HYDRO FLASK IS THE 32 OZ WIDE MOUTH
Let Us Know: What Size Hydro Flask Will You Be Getting?
Now that you know what size Hydro Flask you are going to get make sure you take this quiz on what color Hydro Flask you should get.
General Tips On Choose The Best Size For You
While the above quiz will be extremely helpful in narrowing down exactly what is the best size Hydro Flask for you the following general tips will also help.
12-24 oz Hydro Flasks Are The Skinniest and Best For Fitting in Cup Holders
The smaller sized Hydro Flasks (from the 12 oz to the 24 oz) in both the standard mouth and the wide mouth have the smallest diameter.
This means they are more likely to fit in a cup holder and will be easier to hold with one hand. Click here to see my tests on whether or not a Hydro Flask fits in a cup holder.
Once you jump up to the 32 oz size the bottles get A LOT wider and won't fit in cup holders anymore.
Only The Wide Mouth Bottles Fit The Straw Lid
A lot of people love the flip up straw lid and it's easy to understand why. Unscrewing and screwing back up the normal Hydro Flask lid can get tedious so just flipping up the straw makes drinking more water easier.
This is a popular lid for kids, high-school and college student.
If you want this lid then you need to get yourself a wide mouth bottle (not the standard mouth).
32 oz is a Popular Size
32 oz is big, but it's actually one of the more popular sizes.
School and college age kids seem to gravitate towards this size as well as trades people and laborers who do a lot of physical labor and thus need to drink more water during the day.
In my full Hydro Flask size guide you can see that the 32 oz is actually shorter than the 21 oz standard mouth and is a similar height to the 20 oz bottles.
This is because the 32 oz is much wider and so can hold more volume.
So if you want a large bottle then a 32 oz is a very popular choice.