STOP IT - Make Your Original YETI Lid Leak Proof (see image for fit) - 20oz, Camo

I love how the Ozark trail tumbler kept my coffee hot but hated how it just spilled so easily because of the opening on the lid. Aways having to make sure it doesnt get knocked over & have spillage gets annoying.I got the cup on sale. So when I found this stopper & saw the price was more than I paid for the cup itself, my frugality held me back.But I decided this was the better choice than spills & the slide tab lids that can get residue and have hard to clean crevices or the ones that flip up but you bump your nose when you want to drink from it.It holds my hot coffee awesomely! Theres a tab the covers the small air hole to keep in all the liquid.It fits perfect on my Ozark trail and I even walked quite a few blocks with it, coffee filled but wasn't steaming hot, in my purse...it was laying horizontally...no spills! Just make sure that you don't put the stopper in before the air inside acclimates if your beverage is hot because it can build up pressure from the heat.I like it so much I may just buy the other 30 oz cup & get the "Stop It" for that too!

It seems like it'll be pretty hard to destroy this thing. It works great and it's easy to use, so I'm happy. I tried hard but my YETI tumbler simply would not leak with this thing on it. Testing it was fun. I filled the tumbler halfway with water, fastened the STOP IT, stood in the bathtub, and did everything from holding the cup upside down to shaking it to waving it around like a hammer-wielding maniac. Not a drop leaked out. I work in a metal shop and on construction sites (I am, in fact, a professional hammer-wielding maniac). Everything you bring has to be tough, right down to your mug. It's nice that my coffee won't get all over everything, especially when I'm driving on rough ground and the tumbler is bouncing up and down in my truck's cupholder.This company has fantastic customer service. They'll take care of you. George returned my messages really quickly and directly mailed me the correct color himself free of charge after Amazon sent me the wrong color from their warehouse two separate times (and I got a refund from them each time).

UPDATE: Company reached out to me personally and gave guidance on using this with hot liquids (the Burp-It method). While I still don't feel confident this would stop my Yeti from leaking completely, I can certainly use this lid to stop most leaks. Upgrading to 4 stars because of the VERY excellent customer service - wouldn't be surprised if an updated design was introduced later down the line for hot beverages.Original review - Not sure why this gets so many positive reviews, or if mine was a dud, but my Yeti still definitely leaks every time I put this on and it's tipped sideways with fresh coffee inside. I noticed it leaks through the vent hole, so maybe the suction on the lid there isn't as good? Tossing this out and going back to my MagSlider until I find a better alternative.

Disappointed in this product. With all of the 4 and 5 star reviews on this product, I was excited to give it a try. After installing it on my Yeti 20 oz, I found that it works ok with water in it. However, the second you put a hot item in there, such as coffee or tea, the seal is gone. The lid does not want to stay closed and the rubber stop does nothing. I tried it on 3 different Yetis and all of them had the same end result.Would not recommend. I will be tossing this one and continuing my search for another product.

This has been great on my Yeti. I bought it to take with me while off-roading in my Jeep in the Arkansas mountains. It can be really dusty up there during certain times of the year with light rainfall and having the top and doors off has always meant dust and dirt would get into my Yeti. This product has stopped that problem! I also like that I can remove the lid with this in place and the lid stays attached to the cup for refills.Only issue i found with it was that if you completely remove the lid with this fully attached and then put the lid back on, the lid doesn't want to stay fully seated in the cup. I found that this was due to the pressure being built up by having the lid holes covered up. Simply pull off the STOP IT from the holes, seat the lid fully and push the STOP IT back down solves this minor issue.My wife and I use our 30oz Yetis a lot and we can't wait for the new STOP IT that comes in that size. We will be ordering two as soon as it's released!Overall, this is a GREAT product that doesn't disappoint!

Not a great fit for RTIC tumblers! The cutout is shaped differently so it does doesn't prevent leaks. It's also too tall for use with the RTIC handle on the 30oz tumbler. With the handle in place, the STOP IT is forced up above the rim of the cup, making it difficult to put the lid on securely. I like the idea so I might look for a lid with an oval shaped opening and trim the top edge down a bit to see if I can make it work for my cup but I think my husband will just end up removing his and STOP using IT.Update: I bought Yeti lids for our 20oz and 30 oz RTIC tumblers and the Stop It does a much better job preventing leaks. If the lid is not put on straight in line with the Stop It, the air hole may not be covered properly and minor leaks occur but as long as I make sure the lid and Stop It are aligned, it does an excellent job preventing leaks.