Accordingly an embodiment of the invention defined herein is a drinking glass, cup or bowl made of glass, porcelain or other ceramic material which is either entirely coated with a SD/DL material in the order of one or more thousandths of an inch or less or has such SD/DL material coating just the rim thereof in a band extending over and around the rim to a distance of 1/8 to 1/4 or more on both