by Diane Spicer
This Hiking For Her Hydroflask review will give you all the details about this metal hiking water bottle's performance on the trail.
A few disclosures before we get started:
As always, this hiking gear review is provided with you, the reader, in mind. Staying hydrated on a hike, winter or summer, is important.
Will a Hydroflask contribute to your hydration bottom line?
Let's find out!
Not every hiker likes metal water bottles.
But every hiker should at least consider the merits of carrying an inert metal bottle, as an alternative to a plastic water bottle.
According to the label, this 21 ounce double wall vacuum insulated bottle is constructed from 18/8 Pro Grade Stainless Steel.
I didn't know what that meant, so I looked it up.
Heads up: Don't scrape or scour this bottle with anything scratchy, and don't use chlorine (bleach) on it if you want to preserve the metal finish.
This Hydroflask bottle features a powder finish, setting this bottle apart from other metal water bottles on the market.
This water bottle is compatible with two different caps:
This Hydroflask review will look at the merits of both types of caps.
The first thing you'll notice when you pick up a Hydroflask is its vivid color.
On a gloomy rain hike, it will brighten your day!
Your fingers will also detect a grippy texture, not bumpy but definitely not smooth like you would expect with a metal water bottle.
I can see two benefits of this powder coating:
Will this lovely powder finish stand up to the abrasive inevitabilities of the trail?
The 21 ounce flask fits pretty well in my hand, is lightweight, and just the right size for a side pocket on all of my backpacks.
Here's where we focus on the two types of caps for this bottle.
The standard loop cap, pictured below, is exactly what it sounds like: a rigid plastic cap with a big hole in it, for looping a finger, carabiner or cord through it.
That makes it handy for pulling it out of the mesh pocket, for tethering it to other gear, or for locking it down tight when scrambling up hill.
According to specs, this cap is:
The hole in the middle provides access for your finger when you're carrying the bottle on a short walk.
The hole also accommodates a carabiner, for clipping it to your pack or some other gear.
And it makes a fine place for a piece of tough nylon cord, like this one shown on an old water bottle of mine:
Why should you consider this inelegant hiking hack?
This may not seem like a big deal to you, sitting in front of your screen on a level surface in moderate temperature and adequate light conditions, reading this Hydroflask review.
However, take heart: It's less than $4 US to replace the cap, if you decide not to use this hack.
Now for the sports cap, pictured here:
Why take off the cap every time you want a sip of your beverage?
The sports cap allows you to take a sip simply by pulling up on the mouthpiece of the cap.
A few things differentiate it from the loop cap:
The rigid plastic loop makes a great way to handle the bottle, and a place to clip it to other gear for easy access.
There are two things to be aware of if you plan to use this sports cap with the Hydroflask:
It takes a bit of a tug to get at your beverage, so if your hands are cold or if your fingers are sore (arthritis comes to mind, or the soreness of the second day of a backpacking trip), it might be a bit annoying to pull up the tab.
Here's a bigger problem: Dirty hands touching the cap every time you drink could transmit microbial trouble makers to the beverage.
So good hand hygiene is important if you want to use this cap but tugging with your teeth doesn't appeal to you.
To sum up the cap options in this Hydroflask review:
Both caps were leak proof, and stayed put as well as released easily with minimal turning (again, important for sore or small hands).
This company is based in Bend, OR - a city which prides itself on its outdoor focus, and for good reason.
Hydroflask has been around since 2009, which means they've got this hiking hydration solution figured out by now, right? In fact, you have a lot of options with Hydroflask:
Hydroflask gives back 5% of net proceeds from each bottle if you send in your serial number (prominently located on the backside of the label).
Their lifetime warranty means that if there is a manufacturer defect in your flask, the company will make it right for you. Get the details on the Hydroflask website.
This metal water bottle would make a great gift for a hiking buddy, because it's durable, functional, and looks great.
In fact, these bottles can go anywhere, not just on a hiking trail.
And good luck picking out your favorite color - there is an amazing array of vivid hues to choose from. You can even custom design a multi-hued flask of your own!
For smaller hands, the coated finish provides extra gripping surface, so think about one of the smaller volumes (12 oz or 18 oz) for the kids you hike with.
And for big thirsts, there is a 24 oz bottle available.
Time will tell how dinged up and dented this bottle will become, as I use it for all four season hiking trails. I'm hard on my gear, so if the beautiful minty green finish lasts for awhile, I'll be amazed.
I plan to update my Hydroflask review if any issues surface, but so far, I think this water bottle is a great piece of hiking gear.
This 20 ounce standard mouth bottle has the versatility of two cap choices, it's easy on the eyes, lightweight, and made of durable, inert metal with no chance of chemical contamination in my hiking hydration choices.
And all for a reasonable price (around $28 US at the time of this Hydroflask review).
flask will last a long, long time regardless of how much wear and tear
you throw at it (although it might not be as pretty - stay tuned for
some follow up photos.)
If you'd like to read up on what to put in your flask to keep yourself hydrated on a hike, go here.
Maybe you still have a few questions about how a Hydroflask will perform for you on the trail.
Send them to me here, or use the Ask A Question link below.
I'd be happy to let you know why I think a Hydroflask metal water bottle is a good choice for hiking hydration.
Thanks for reading this Hydroflask review!
Now get busy choosing your favorite Hydroflask color ;)
Hydroflask Review: 21 Oz Standard Mouth Bottle
About the author
Diane is the founder of Hiking For Her.
She's been on a hiking trail somewhere in the world for 5+ decades & loves to share her best hiking tips right here.
All rights reserved.
Photo credits: All photos on this website were taken by David Midkiff or Diane Spicer except where noted.
As an Amazon Associate, Hiking For Her earns from qualifying purchases.