AvecToi Set of 2 Food Grade Silicone Mug Cover Suction Lids for Coffee Mugs, Tea Cups - Keep Drinks Warm or Cold Longer (Espresso)

I'm very happy with these. I use mugs that are larger than normal coffee cups--the diameter of my mugs is 4". The lid's flat side fits exactly and the pointed part hangs over the edge a little. There is just enough to push down a tiny bit to create suction. On the 4" mugs, the suction works, but is weak. I tried it on a smaller, more normal-sized mug (3") and the suction was so strong I was able to lift it from the counter using the pointy thing on the top of the lid. So anybody with regular-sized cups, these work great. And anybody with large mugs, wondering if these work...they do, just don't expect NASA-grade air-tight suction. Before buying these, I considered a couple of the other silicone drink covers on Amazon but they were all about 4" too and since I knew my mugs were 4", I worried they might slip right into the cup if I pressed down on them. I'm glad I went with these umbrella-looking ones because the pointy edges give it just enough extra. I also use an electric cup warmer and the lids keep the coffee much warmer than without them. They came packaged in a bag with the (U.S.) 'FDA' logo saying "FDA approved silicone".

My quest for the ideal lid began the day I nearly gulped down a spider with my morning coffee. It seems that the spider, whose leg span I estimated at just over an inch, liked starting its day with a dip in a heated pool. I couldn’t tell if the spider had climbed the side of the mug or lowered itself from the ceiling. Either way, I was suddenly quite interested in lids. Although the odds were low that another spider might someday play Mark Spitz in my coffee, the mere thought of eight, wildly kicking legs in my mouth was all it took to send me lid-hunting. Looking back, I’m not quite sure why I settled on the AvecToi. Twelve bucks seemed steep for a pair of flexible, plastic octagons. (One side per spider leg?) But if you can imagine being thrilled with a lid, thrilled I am. The AvecToi, it turns out, does a good deal more than provide a spider barrier. Besides covering the mug, it seals it. I mean, really seals it. It seals it so well that you can pick up a 16-ounce mug of coffee by the lid’s center stem. I know this firsthand, because, feeling foolhardy, I gave it a try. Yet grasp the lid by the edge, and it comes right off. The seal lessens the likelihood of spills—and holds temperature in. I use an electric coffee warmer, which on its own keeps coffee tepid at best. When I add an AvecToi lid to the equation, the coffee stays HOT. Bonus benefit: if you’re having soda, it keeps carbonation in. Now when I take my time sipping my morning coffee, I am worry-free as to spiders, and my coffee stays hot. The product is easily worth the twelve bucks.

I just bought mug warmers for myself and one of my sons so our tea & coffee would stay warm while we were gaming into the wee hours, and I picked up these silicon covers to help retain the heat (which is actually probably more important than the mug warmer TBH). I didn't expect to have a kind of emotional reaction to them, but they are SO COOL. They are just the right weight and size and they just feel... right. Kind of cool looking, really easy to clean (slick rubber... just give 'em a rinse or a quick handwash with some suds), and the fact they just grab right onto your mug and cling there is awesome. SCIENCE BABY, YEAH! Am I saying these things are great because they suck? Seems like a paradox, but yeah. You can grab the little nipple on top and pull pretty hard and they won't let go, they grab on that well. But still easy to remove, just put your thumb on a side flap and barely lift. SCIENCED AGAIN! Still reading? Stop now and click buy.

They do keep bugs and debris out, and your drink hot or cold. While they won't easily pull off, they will slide off sideways if you happen to push them, especially if the rim of the container is wet. This, however, is preferable to knocking over the drink if you catch the edge with your elbow! If you push down slightly on the center of the cover, a slight vacuum is formed between the drink and the lid, sufficient that an 8 oz. mug of hot tea will not spill if turned horizontal, at least not immediately. If they added a few raised concentric ridges on the underside to keep them from sliding, they'd be great.

These little mug covers are better than I'd anticipated. Dimensions are 4.125" across from straight edge to opposite straight edge, and 4.5" across from point to opposite point. The covers stay firmly in place on my 3.25" diameter mug with a bit of suction to prevent them slipping off. The silicone material is just thick enough that they don't flop into the mug. My coffee and tea are now noticeably warmer than with the plastic coffee can lid I had been using. They rinse off easily and dry with a little shake or two. The only thing I'd change is to have a slightly bigger center knob -- not a problem for my fingers, but a little difficult for larger fingers to grasp. I feel silly being so excited over such a simple product, but it's so nice to get something that really works well, I love them and will order more.

チョットしたことですが 少しでも冷めないようにと購入させて頂きました 助かっています

コップを持ち上げれるほどしっかりフィットしてくれるし、剥がす時は簡単に剥せるのでちょうど良い

埃除け目的に使い始めましたが、それ以上にサーモスのコップと組み合わせて使ってると保温/保冷性能がとても向上して重宝してます。飲み終わったコップの蓋としてもそのまま使用し続ける事で、多少そのまま放置しててもコップの中が乾燥しきって飲み残しが跡になってこびり付くなんて事もなくなって、ホントちょっとした便利アイテムに過ぎないと言えば過ぎないんですが、一度使い出すと手放せなくなります。 難点と言えば、洗うモノの量がこの蓋の分、増えるのと、温かい飲み物に蓋をしていた場合に内側に大量の水滴が溜まって、蓋を取る時にうっかりするとけっこうな量の滴を周りに垂らしてしまう事ですね。

蓮の葉みたいでかわいいな、と思いグリーンにしました 愛用します

『商品寸法 (長さx幅x高さ) 11.9 x 11.9 x 0.3 cm』と表記されているが、実際は11.5cmもない。 大きめのコップと計量カップに使おうと思っていたが、使えそうにない。