Perfectly replaced seals that have gone missing or broken from various standard metal water bottle caps for Sho and S'well 500 ml bottles and a generic kids one with similar cap. Not identical size but fit fine, no leaks. Very useful and happy they save buying a new bottle.

Very cheap and fit well to an off the shelf water bottle. Expected to have to replace the bottle but the seal although slightly different in form worked perfectly, no leaks at all.

I don't do many review because I usually cant be bothered but I had to do this one as like many people I have a few flasks that have started to leak due to the O-ring splitting or falling out/not fitting properly after use. Instead of chucking out my flask I decided to give this a go and am very glad I did, not only does it fit perfectly but I have plenty spare for other flasks in the house.Well worth the buy.

Bought to replace my o-ring on chilli bottle but it’s a different shape.

Arrived as specified. I was looking for a replacement seal for my daughters systema water bottle and these seem to fit the bill. I have a generic water bottle and they fit my perfectly. Now I read what others had said some good comments about the seals saying that they worked and other slayting them. My daughter and I take fizzy water in our water bottles now because plain water seems dull compared, and the only reason why I needed a replacement seal, the lid exploded off when my daughter opened her bottle and unexpectedly unawares of the gas built up from the water the lid shot off with a loud bang and seal was nowhere to be found. I replaced the lid with the new seal, it fits perfect but still wants to explode so now she holds the lid down firmly when unscrewing the lid. So you see they work, no leaks and as you get 10 so we've nothing to lose. Great replacement. Thank yo