I got this hoping it would help my Owala be less likely to slip around on the table or in the car. The boot fits well but it always makes my Owala feel a bit tippy, as if there is an air bubble at the bottom. In the car it helps keep my Owala secure in the cup holder but almost does the job TOO well! lol. I can barely get it out of the cupholder with the boot on because it provides too much friction. Oh well. Not a total loss but not exactly what I needed.
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