2 Pack LEAK PROOF lids for 30 oz tumblers, 100% air-tight vacuum open/close lock, spill, splash & leak proof, BPA-free, fits Yeti, Rtic, ozark, and most 30 oz tumblers

It closes & is spill proof.

I bought these for my Polar Camel 30 oz insulated mug and thought for the price, I wouldn't be out much if they didn't fit. Much to my delight, they fit perfect! And you can't beat the price for a 2 pack. No more nasty lids for me! Excellent quality, couldn't be happier.

Works as discribed, I purchased 2 more. If you have trouble getting it to fit your cup you need to open the lid. The air inside the cup is keeping the lid from fitting the cup.

Great product, leak proof. The only issue was the one my wife was using broke within the first two weeks. Mine is still working just fine, no more spills at the gym.

It's good to have been working for a long time, but I only drink water with my yeti ramber tumbler. As the seller says, keeping the water warm while cleaning is not likely to break.

Needs an air hole. Very hard to drink from

Fits my mug, and I filled my mug with water, turned it upside down, and shook (gently) and the lid stayed in. A couple of drops were forced out, but that's completely reasonable, all things considered.

Bought a set of these lids as a replacement to an original that came with the tumbler which broke. You can turn the cup upside down and not a drop leaks through. Great product.