Patelai 30 oz Replacement Rubber Lid Seals Compatible Seals Lid Gaskets for 30 Oz Insulated Stainless Steel Tumblers Compatible with RTIC Atlin, Randomly Shipped in Oval and Round (White,6 Pieces)

First thing is know the amount of oz your cup holds and then it will be easy to find the rubber seal. Worth the money, fits like a glove and for my cup.

This fits my wide bottom Yeti cut perfectly. I think its 14oz? Its the kind that is the same shape from bottom to top. This was perfect for replacing the seal so i can keep using my Yeti for years to come. Very happy with these. And the seal is nice and snug.

Definitely won't leak. Not hard to put on, but so tight it hurts my thumb to push the lid off. Hopefully that will get easier. Much tighter than on a new cup. I had to pry the lid off with a spoon.I've been using this for almost 2 years now, and it's still too tight. It still hurts to pry the lid off with my thumb, so I still pry it off with a spoon. Other than that, it definitely seals the cup. It will NOT leak around the lid.

Update from my original review- not sure what I was doing wrong originally,or if they just needed to stretch out a bit, but these seals now work just fine on my yeti tumblers. I feel very bad about my original review- actually so pleased now that I am ordering a couple of new setsLeaving original review in case some consumers having the same issue as me at first:These are oval in shape, not round as pictured in description . I took a photo of them next to an original seal I was hoping to replace. Not sure if the shape has any significance or not. Regardless I tried several different seals from this pack and all of them resulted in my Yeti 14 ounce Tumblers leaking all over me. They look fairly well-made and perhaps they work great with other brands Which is the only reason I didn’t give a one star rating. Seller shouldn’t advertise that they work for a brand that they don’t actually work for. Not even worth the hassle of packing them up and driving to a distant Amazon drop off station.

Received as described. I researched if these would fit a Simply Modern 32 oz. Cruiser, and thought I saw a reviewer that said it worked. Alas, these do not. The gasket fits the channel in the lid, but I had to slightly stuff the edges of the gasket inside the channel rim. After firmly and evenly pressing the gasket into the channel all the way around, it looked like it would work, but the lid wouldn’t sit down into the mug straight or completely. Then the lid was very difficult to try to get off. I planned to get a second mug eventually, so the next one I’ll make sure uses these. (And hopefully they’re still worth 5 stars!) When I have more time, I may try these again and sacrifice one to a razor blade to see if slightly shaving down one of the lips would work. 🤷🏻‍♀️

The diameter sizing is way off - bought it specifically to fit a lid ~3 inch across. Actual measurement of gasket is around 3.75" - the larger lid size. Returning

This would work fine for other things, but I bought them specifically to replace an old one for my Reduce 34-oz Tumbler, and it doesn't work the way I'd like it to (hence the 3 stars). The gaskets are the right diameter, but have 2 peaks that aren't the same length - one is taller than the other; whereas the Reduce tumbler gasket has 2 peaks that ARE the same length. The unevenness means that it's EXTREMELY difficult to remove my tumbler lid (which means it creates an unbreakable seal, but it's a bit too much for me).

The Thermoflask's from Costco are my absolutely favorite water bottles. I was so bummed when I couldn't find a replacement silicone piece for it because mine was getting this black mildew on it that couldn't be washed after years of using it. I measured it and guessed that this would be the best fit for it and it fits so well. I'll definitely buy these again too extend the life of my favorite water bottle. Highly recommend.