STOP IT - Make Your Original YETI Lid Leak Proof (see image for fit) - 30oz, Black

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).

It was helpful to read the reviews before purchasing. You do have to let the heat build up before putting the Stop It down or it will pop the lid up. Also I have a handle for my yeti tumbler and the Stop It comes down to far for it to keep the handle tight so I had to tighten it with a piece of a rubber band to make the handle stay tight below the Stop It. Other than that it works just fine and helps to keep the coffee hot and less likely to spill.

Purchased the STOP IT with high hopes of a no-spills travel lid after my wife bought me a 20oz Yeti Tumbler for Christmas. For whatever reason, Yeti doesn't provide a seal-able lid with their mugs from the get-go, which is pretty stupid. Otherwise it's a great product. Anyway, after watching a few different "spill-less" lid test reviews on Youtube, I thought that this product would be a safe bet. Boy, was I wrong. The flip tab would pop out of the Tumbler's hole after only about 5-12 seconds after I put it in place, no matter how many times/different ways I tried to ensure that it was sealed. Didn't matter if there was hot liquid in it or not (waited for air inside the lid to heat up first as directed). At one point I got it in and it seemed to stay, so I tested it out over the sink. It worked the first time I tipped it, and with confidence growing, I tipped it again for good measure. Well, my confidence was shattered as the tab once again popped out of place and hot coffee splashed down the drain (and on my hand). Returning this garbage for something that actually works well. I'd advise you to select a different lid option as well.

Love the Stop It! Does exactly what it says: prevents liquid from spilling out of your tumbler. My husband has a Yeti and I have an Ozark Trail (both 20 oz size cups) and the Stop It fits perfectly on both models. I'm constantly carrying multitudes of items to and from the car and have twice (before now) spilled water all over the things I was carrying. I searched for a no spill lid and came across the Stop It and I'm sooooo glad that I did!When I turn my cup upside down the Stop It stays perfectly in place and does not let one drop out. I also shook my cup (while holding it upside down) and still, no leakage. Very impressed! :) I highly recommend this item to anyone looking for a way to prevent water from leaking out of their tumbler.

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.