2 Replacement Lids for 20oz Stainless Steel Tumbler Lids-Replaces Only Covers With a Top Diameter of 3.4 inches（Bottom Diameter of 3.23 inches）

My lids came with one broken in which case it would have been nice to have a spare but the good one (black slider) fit my cup perfectly. My cup was 3.3 inches (83 mm) with my calipers , not too tight or loose, just right ! A ruler in mm though should get you a close idea of your size cup. The slider was “sticky” as many had mentioned which was irritating and my temporary fix was to put castor oil on the inner side of the slide which made a nice smooth action and I didn’t particularly mind a few drops of organic castor oil in my coffee, no particular taste but a little messy, needed to be redone every new cup full to stay smooth however. One day a month or so in it occurred to me to examine the slides more closely and in so doing it occurred to me that when they formed the slider to the lid slot with heat(not a correct supposition)there was no way to leave appropriate clearance for smooth action. Then it came to mind that a thin scraping along the travel of the slider on the lid part would give me the few thousands of an inch needed for silky action ! This was easily accomplished with a razor knife with the blade sharpened with the bur on the side that would scrape as I used it right handedly . A few light trips with the blade sideways bringing up some thin curls of plastic and then sliding the slider each way to get each end of the track did (a part of the trick) (Skip this step until you try the side track first) Then I noticed as well that there was a slight catch in the inside of the track also which I smoothed out with the same method with the point of the knife down and the sideways motion. In retrospect, on further inspection, I should have noticed that the slots are larger at the ends which allows the slider to be removed (after running under hot water to soften the slider plastic) for cleaning by squeezing the tabs inward to remove it at either end of it’s travel in the slots. Then tentatively just scrape the humps (or just the larger one to start) in the middle which keep the lid from falling shut when you tip it up to drink. It didn’t take me long to figure out that simply pressing one’s nose and/or lips against the slider after opening was an easy way to keep it open for drinking and better yet it falls shut after you’ve gotten your sip/drink , Auto closure! There’s a delicate point to be mastered when scraping the middle hump on the track if you’d prefer the usual action ! Was nice to learn that one can remove the slider to clean under it though, even the expensive Swig lid, as near as I can tell, can’t be cleaned under the slider. So all that said , it may not be needed to do anything except shave the middle hump (larger on one side). Still, I think I would rather have it too loose than too tight. This was discovered by taking a bit too much off the hump and possibly on the top of the lid as well causing to it being now too loose to stay put ! This lid also fit my wife’s expensive cup (Swig) for which we had just unfortunately spent around 20$ for a new lid ! Also I had another favorite cup that this lid fits as well so it seems to be a common size but just a silly mm either way on our other cups gets either too snug or too loose for a perfect fit! After much shopping, this lid size was very rare so I consider it an overall good buy! I assume the usual case would be two good lids, we can always hope anyway !

Perfect fit thanks to the detailed description with the pictures. I literally needed 2 odor these lids. They original lids did break easy but the cups are so special, it's worth it. Might buy more to have on hand. Nice plastic material, light lid with a good seal. There is no color to them, perfectly clear.

I have a favorite thermally insulated mug which I travel with a log and use as home as well. I accidentally dropped the lid on the floor and broke it. I needed a replacement lid so that I could travel without spilling in the car and also when I watch tv when I accidentally tip over the mug by accident. I measured the outside diameter of the inside lip of the mug and searched using this criteria and came up with the perfect lid replacement. See pictures.

The lid fit perfectly. My only complaint is that it is hard to clean under the sliding piece that opens and closes. I can't figure out how to take it off without breaking, so crud tends to build up underneath. The black seal ring slips on and off easily for cleaning.

I purchased these as replacement lids for a travel mug. They fit snugly with a great seal, are very well made and hold the heat in the cup better than the original lid. They are clear with a sliding cap you can open when you want to take a drink and close when you are finished to prevent spills. This part doesn't come apart and it is difficult to clean under this area so I'm hoping this isn't going to be an area where mold will grow...

Good quality and economical product, but it still does not fit my cup perfectly. Even though the size described on the product is consistent with my cup

I was excited to get this new cover for my large thermal containers. I have YETI and other brands and these lids fit perfectly. After only using one lid on my YETI for three days, it broke. The sliding cover for the drink holes broke. The moving lid closure that fit really snug just broke on both sides at the same time. The sliding closure has a thin piece of plastic that fits in the groove that goes back and forth over the drinking hole. I slowly poured out my coffee and tiny bits of this red plastic were on the bottom of my YETI container. This is dangerous in my opinion. The fact that it broke after three days of use with my morning coffee just tells you how cheap/flimsy this design is. Don't waste your money on this. It is a dangerous design in my opinion. I ordered two lids from this vendor that were clear with a black clicking closure that moves back and forth to open and close. This black closure clicks when you move it back and forth. This lid broke the first time I used it for Coffee. The drink opening had a line break in the middle of the drink opening hole all the way through the plastic that went to the outer seal. This break happened within an hour of using it. The lid leaks now and it slides easily without clicking so it slides back and forth without touching it. Note: I had to add this review to the other review because you can not review each different lid this vendor offers separately. So far, these two different types of lids are JUNK from this vendor. I did buy another type of magnetic lid from this vendor. It actually works. I think I will pony up and buy the real Yeti lid of this magnetic type. I wanted to try these cheaper ones first to see if they might work without paying the high price for four Yeti lids. Now I know which lid really works well for Coffee.

I Loved these when I first got them in April of 2025. It is now January of 2026 and they are both broken from normal use. While they worked, they were great. Unfortunately, they just don't last.