I certainly do love these Reusable Wine Stoppers. They really did keep my open bottle of wine fresh, just like it was when I first opened it. I can not drink a whole bottle of wine by myself, (well, I guess I could, but I don't.), and I admit I was skeptical about this cap keeping the wine fresh, but it did.
I got 2 black and 4 red stoppers, 6 in total, if you are having a gathering, party, etc., and have leftover wine, just pop one of these stoppers on the bottle, no wasted wine. The stoppers are silicone and do provide a air tight seal.
I have not experienced any stretching of the stoppers, they are reusable and they can go in the dishwasher after each use. I did not experience any silicone or rubbery smell to my wine either.
I am super pleased with this 6 piece wine stoppers by P&M Home and do highly recommend them.