This is a silicone lid gasket (new), quantity 1, for a Skater Co., Ltd. direct stainless steel bottle for children, 600ml. The part number is SDQ6. As a bonus, I'm including 3 used gaskets of the same type and 2 used drinking spout gaskets. They are used, but I thought they might be useful as spares in case a gasket gets lost. Since they are used, some may have stains that won't come off. Please discard them if you don't need them. There are no smokers or pets in the household.