They did a great job with this lid as most with this design are a leaky mess but there's doesn't appear to leak at first. However, when using with hot beverages, as this lid is intended for being a tumbler lid, it leaks if put upside down or shaken, not much but also not none. You guys should take inspiration from other brands and make an official actually leak proof lid, like what Contigo has or Iron Flask. There's a ton of third party leak proof chug cap lids for hydro flask on Amazon that are clones of iron flask designs. I prefer Contigo lids because they tend to hold up better, I particularly like their auto seal lids and how they fold out for washing. However the build quality of your bottles and the materials you use (that is hydro flask) is nicer so I want to remain your customer.

It's perfect for what I needed. A small coffee tumbler with a simple opening mechanism and that it leak proof. It's not different than others, but I find it pretty also.
The price is okay. It holds the temperature pretty well as described. The color finish is pretty resistant to scratches. It also easy to disassemble the lid to clean it.
I like the handle. It's comfortable to hold and you can also clip it to your bag with a carabiner. If you need a silicone base protector, it's the Small size that you will need. I like the fact that you can buy the lid separately if you need to (in case it breaks or the smell can't be removed).
I have been driving alot recently, so this is perfect for the cup holder. Just be aware that it holds around 350 ml. I personally think that this is a great bottle ( speaking for myself who bought too many bottle). The quality built is great.
Nothing bad to say about it so far. The opening is big, so you can easily put ice and it also makes it easy to clean it deeper with a sponge.

I recently got the 40 ounce wide mouth bottle in the color “Laguna” and I bought the “wide mouth flex sip” lid in the color Laguna to match my bottle and the color snapper (a dark pink raspberry color) . It took me a minute to get used to opening and closing the lid because I’ve never had one like this before on a water bottle. But I really love this lid & ice does NOT obstruct the pour of the water when it comes out. It’s really nice now that I’m used to it. I don’t want to not use it!! Just be aware even when you close the lid a little water collects in the spout reservoir. It’s just a few drops but it’s not leaking. And there is a tiny air hole because this lid is made for hot beverages and I’ve had the water bottle over on its side full of water and it doesn’t actively leak out, if anything a couple drops might come out, but that’s it. Yes I would recommend this lid. If you don’t want to have to unscrew your lid all the time to drink or you don’t like drinking from any straw (like me) then this lid is perfect!

We have 4 of these, between daycare, under the car seat, a missing piece, a forgotten backpack, this and that we’ve just found it easier to have a bunch because there’s always one (or a piece of one missing. 3 of them are flawless, tough, easy to use but one has lost a little rubber part on the lid so it leaks. It’s a pretty small rubber part that’s pretty easy to pop out and loose, for that I give this bottle a 3 star. Apart from that it’s true to size and the colour is accurate. It keeps cold cold with double walls. The metal is tough, so is the plastic kid. The paint seems to not chip as easily as older models and they give 2 straws now which is nice. Overall a good product, perfect for pretty much any occasion. My toddler loves it for car trips, parks, whatever. Doesn’t spill upside down running around in a backpack full of stuff, pretty important when you’re out for the day with the little ones.