The bottom fits loose on the 32 oz. Would be better if you had a bottle bumper then put the Reuzbl over it. The fit it snug then.
Would be 5 stars, but the fit is loose. Otherwise, great product.
Keeps my son's bottle from making so much noise, it's easy to carry and hold, and the glow is awesome.
We have the penguin brand of knock off hydro flask and it fits perfectly.
It is awesome I love it.
I get tons of compliments on mine! Have them for all of our hydro flasks and my kids!