12PCS Halloween Straw Cover Cap for Stanley Cup Straw Cover for Stanley 30&40 Oz Tumbler Reusable Soft Silicone Straw Topper Straw Protectors Drinking Straw Caps for 10 mm Straws

12pcs Cute Halloween Straw Cover: Silicone straw covers cap for stanley cup come in 16 different styles with a 0.4" (10mm) inner diameter compatible with stanley 30&40 oz tumbler straws and 0.4" (10mm) diameter drinking straws. Please confirm the diameter of the straw before purchasing.