I was looking for a great bottle, that would hold up in my daily living. The cap is nice and secure and gives me confidence that it will not spill when tipped over. I know I’ll be ordering another one in a different color.

I love the HIIT bottle!
It stays hot or cold for longer than claimed and it looks amazing!! The bottle is nice to hold and the attached loop is very convenient! Easy to clean and use! Twist top works perfect and doesn’t allow any leaking. I want another one!

My HIIT V3 comes everywhere with me. It is awesome for hot and cold drinks. I use it mostly for protein shakes, water and coffee and it keeps their correct temperature for about 24hours.
There is clearly a lot of thought behind the design and it is really well engineered.
Definitely worth the price!

I have thrown out all of my other bottles - I use my HIIT Bottle for everything

Shipping added another 10 dollars that I wasn't expecting. For that price I would have expected faster delivery. Items didn't fit inside shipping box, they were poking out of the top. I use the hiit bottle every day and it functions as intended, but there is room for improvement. The lid is too difficult to unscrew, so it probably needs deeper, more numerous grooves to grip. The tea infuser should be on the bottom of the bottle so it contains to infuse as you drink or you can have only a little tea if you want. You can't use infuser for tea unless bottle is full, in other words. I'm using a drop in tea infuser ball instead, it functions a protein shaker too. If your tea infuser could be detached and dropped down into the bottle it would be great. The top of the lid is taller than necessary and I don't know the purpose of that shape. There is already a place for a lanyard so why another hole in top. At least fill the lid with insulation if it's going to be big like that

Really enjoying my HIIT bottle. Keeps my protein shake cold. The only thing is that sometimes the lid is a little hard to unscrew. One thing that could improve is customer service and supply. It took a really long time for me to get my bottle, and I wanted to order the tumbler lid and straw, but it has been out of stock forever! Too bad.