Straw covers for Stanley tumblers, 4-piece set of colorful silicone caps for 40oz cupsPROTECT YOUR DRINKS: straw covers are perfect for Stanley or glass cup with lip to protect beverage drinks against dust or dirty things. Keep your drinks clean and hygienic.<br> GREAT DECORATIONS FOR DRINKS: 4 flower shapes in different colors, and the design is very cute and much-loved for kids, girls, boys, women and men. A straw protector and a mini decoration for your drinks.<br> SIZE WIDE USE: Compatible with 9-10mm reusable straws and 30&40 Oz Stanley cups, Stanley straw toppers for tumblers can be used outdoor and indoor, to be specific, with lip and straw, Stanley cup, coffee cup, glass cup, vacuum cup and so on are good choices.<br> FOOD-GRADE SAFE MATERIAL: Made of food-grade PVC silicone material, the Stanley straw caps are safe for kids and adults, also durable, odorless, nontoxic and reusable. Washed by hand or dishwasher and dried in time, the straw tip covers can effectively keep clean.<br> IDEAL GIFTS: With decoration and protection function, the straw cover caps are very practical and convenient, and you can use them easily without doubt. Perfect gifts for kids, girls, boys, friends and family.