COMPATIBLE SIZES: The reusable straw lids fit all straws with an outside diameter of 10mm and are a perfect match for the 30 and 40 oz Stanley Hardeners H2.0 and Stanley Expedition Hardeners with Handle Travel Non-Tipping Straws. SAFE & HEALTHY MATERIAL: Our straw sleeves are made of food grade material, BPA free. Hand washable or dishwasher safe, giving you peace of mind every time you use them. EXQUISITE AND UNIQUE DESIGN: The Cole Duck Series Stanley Straw Sleeve Combo Pack is so cute and playful that it can perfectly match the color of Stanley cup. IDEAL GIFT CHOICE: Our Stanley Cup Cole Duck Straw Holder makes a delightful and thoughtful gift for friends, family or yourself. Its attractive appearance, ease of use and reliable quality make it an ideal gift for any beverage enthusiast. IMPORTANT NOTE: Please note that our Cole Duck Straw Sleeves are designed to fit straws (9-10 mm in diameter). For other brands or different sized straws, please be sure to check compatibility before purchasing to ensure fit. 8-Piece Cole Duck Straw Covers for Stanley Cup, 0.4in/10mm Diameter Straw Toppers Cap ,Compatible with Stanley 20 30&40 0z Cup, Dust-Proof Straw Caps for Water Bottle