Straw Top Cover for Stanley Tumbler H2.O 20oz / 30oz /40oz straws, Hydroflask or any 10mm straws

● This unique, jumbo size black crystal ball cap is the perfect addition to your collection.

● It seals the straw to prevent dust from entering while not in use, or spills while on the go.

● Base - Food Grade Soft Silicone, BPA FREE

● Make your items unique and sophisticated