Our Review of Hydro Flask's New Flex Straw lid

Here's what we think about Hydro Flasks's new Flex Straw Lid

We've seen a lot of questions like:

• How good is Hydro Flask's Flex Straw lid?
• Is Hydro Flask's Flex Straw lid worth it?
• What's different about Hydro Flask's Flex Straw lid?
• Should I buy a Hydro Flask Flex Straw cap?

​With all of Hydro Flask's cap options (not to mention 3rd party versions), it can be a little confusing.  To help keep things straight, we're reviewing Hydro Flask's new Flex Straw cap and will let you know if it's worth a buy.

See our video review below

And if you'd rather read the review, keep scrolling past the video.

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What's Different with the New Design?

At first the new lid may not seem very different, but there are a few key changes.

Original Straw Cap

New Flex Straw Cap

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Change #1: The Handle

The previous straw lid had a hard plastic handle on one side that was basically a finger-loop.  Some common complaints were that it was uncomfortable, especially when you're juggling holding other items too.

The Flex Straw cap solves many of these criticisms.  The handle is the same style as their Flex Cap and Flex Sip lids.

This is a much improved handle design that we are totally on board with.

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Change #2: Easier Cleaning

If you've ever seen the videos of people cleaning out their straw lids, you'll know how nasty they can get.  Thankfully, the new style is easier to keep clean and wash out.  The red piece on the bottom of the cap is a removable silicone piece that can easily be pulled out to allow for easier cleaning.

We appreciate that the new version is even easier to keep clean and sanitary.

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Change #3: Leak Resistance 

Another common complaint of the previous straw lid was that it could leak fairly easily.  The spout wouldn't "snap" into place, so it if wasn't pushed all the way down by accident, then you could experience some leaking if your bottle tipped over.

Based on our initial tests, the new Flex Straw lid seems to be less likely to leak.  The main reason is that the spout "snaps" into the locked position.  Once you hear the click, then you should be good to go and not have to worry about leaks.

We really like this change.  The lid just feels a lot more secure and better-engineered than before.

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Change #4: Insulation 

The old cap really didn't insulate very well at all, but the new Flex Straw cap changes that.  Hydro Flask added their Honeycomb(TM) insulation to the design, and the silicone insert also helps.

One of the main reasons you probably have a Hydro Flask is to have an insulated bottle, so this is a welcome improvement.

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Our Verdict

We like just about every change that Hydro Flask made with this new design.  It seems to improve nearly all aspects of the previous straw lid.  We highly recommend it.

See Pricing on Amazon

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Want to Make Your Flex Straw Lid Even Better?

Try out our FlavorFuze Straw fruit infuser.  It's a clip-on infuser that is compatible with both the old and new Hydro Flask straw lid designs.

Compatible with straw lids

Straw slides through the hole at the top

And snaps securely at the bottom.

FlavorFuze Straw Infuser
​(infuser only)

See pricing on Amazon

Infuser and Straw Lid
​(our lid design, not the Flex Straw)

See Pricing on Amazon