KINBOM 10pcs Rubber Bottoms for Sublimation Tumblers, Skinny Tumbler Rubber Bottom Pads Bulk for 20 oz Tumbler Protective Silicone Bottoms for Tumblers Straight Wine Tumblers 12/15/17/20/30oz (58mm)

They did what they were supposed to do, held up nicely after washing.

These bottoms fit perfectly on 30 oz skinny tumblers.

Item as expected.

I ordered the 58mm and when I got the order it was a 56mm, I dont know if it changed automatically or what

I love my stainless bottles and tumblers. Unless you are buying the really high end ones, you get a bare metal bottom. Ive got some that I use everyday that I love. But the bottoms are noisy and can damage tables or counters. And then there were these. TIPS: Make sure its the right size. No overhang and not just filling the center of the base. Clean the bottom first with alcohol. Let it completely dry. Peel, center and stick! Need smaller? Simply trim off the outer ring. Need bigger? Heres your hack... cut them in fourths and stick each piece closer to the edge. If you have a dip in the center of the base, trim the pieces using the ribs as a guide so you have curved pieces to stick and the base remains open. The adhesive is really strong once it cures, but dont let it soak in water. Hand washing is best. You are only limited by your imagination and trimming skills.