Hobknob Bottle StoppersThis glass bottle stopper takes its shape from the designer's line of hardware knobs while celebrating the beloved ritual of sharing a drink with friends. Hobknobbing, if you will. Pop it into an open bottle of your favorite beverage to keep it fresh and looking smart. Materials: Crystal glass with silicone Dimensions: Amber, 2 x 2 x 2. 2 in Blue, 2 x 2 x 1. 8 in Green, 0. 8 x 2. 2 x 2. 2 in Hand wash with warm soapy water. Air or towel dry. Not