Wasn't sure this little thing would make a difference but it clicks on tight and hasn't leaked once in my bag. Cleaning it takes two seconds, which matters when I'm refilling my tumbler three times a day.
Jason★★★★★
Snapped this onto my insulated bottle and it hasn't budged through two weeks of daily commuting. The fit is snug enough that I don't worry about it popping off in my bag, and it rinses clean in seconds.
Steven A.★★★★☆
It fits my everyday tumbler without wobble, which is exactly what I needed for tossing it in a bag. Took a star off because the finish scuffed a bit after a few weeks of regular use, but functionally it’s still solid.