OF
Well-Known Member
As I stated above .. I have no pracical experience with the heat and stretch .. but perhaps I was focused mostly on the stems that have the ridges cut into the bottom and the channels in my comments .. that really increases the friction ..
Any comments re these cut and channeled stems OF ?
While there might be exceptions none of mine display "really increased friction". I only checked a few but all have notches cut into the rim, meaning that it doesn't touch there anymore, it's still smooth (fire polished) glass on SS where the contact is made? If push came to shove the steel would win out I think. Soda glass, like here, is softer than steel. Some Flint and Quartz glasses might scratch the steel under the right conditions. Nobody has reported scratches around the bottom when the rims hit?
Likewise I never noticed any damage from the grooves up the side, nor recall any reports of damage the seals (like material being cut away). Certainly such grooves never contact the cup so should not be an issue there?
Again, the key is to not torque the cup, you need to twist to get past the seal? That's my advice anyway.
Regards to all.
OF