Unique design: This diamond silicone straw cover is made of high-quality food grade silicone material, surrounded by sparkling artificial glass rhinestones on the outer layer. Let them enhance the charm of your tumbler cup Fashion Charm: Our diamond-flash straw covers come in a variety of colors and can serve as functional decorative pieces, adding a touch of style to your Stanley cup Wide Compatibility: Our stanley straw cover is compatible for Stanley Quencher 1.0/ H2.0 FlowState Stainless Steel Vacuum Insulated Tumbler 40oz/ 30oz. The 10mm straw cap perfectly matches the size of the 8-10 mm straw The perfect gift: 4 in a box diamond straw covers, perfect for giving as a present to your relatives and friends Prefect Partner for Tumblers: This stanley accessories is packaged in a small storage box, which is convenient for storage and use Stanley Cup Accessories Set Including 4 Pcs bling diamond straw cover, Straw Cover Cap for 8-10 mm Straws, stanley cup straw cover for Stanley Cup Stanley 40oz & 30oz Tumbler