Silicone nipple

... Here is from unsightly. silicone nipples on glass bottom spoken, I can not confirm absolutely.
Small, large cent stuff at the bottom, flatter than the coin. Stands out neither in depth nor in height.

We use the glasses for a year. The ugly Profen is not seen and disrupts the Elegance of glasses in any way. Water ingress Flush / washer is also not so far happened at our 6 glasses.
I was initially worried by the critical reviews ... unfortunately. The glasses are great!