The Charles Viancin® silicone drink markers are ideal for your next get together, regardless of the size. Inspired by nature and available in many different colors, they allow every party guest to recognize his or her glass. Made from silicone and designed with a suction cup on its back, they easily adhere to most glasses with smooth surfaces such as the base of a wine glass. Out of ideas for the perfect present? Give them drink markers! Sold in sets of 6. They are still BPA free and dishwasher safe. The tops are about 1 inch across and has a suction cup on the back.