[Stanley Lid Accessories: Butterfly straw covers are designed to fit larger Stanley straws with a diameter of 0.4 inches or 10mm so make sure to check the size before purchasing. Pack of Two: Each pack includes two different colors of straw cup accessories perfect for sharing with friends and loved ones. These fun and cute stanley accessories are great for families and children alike. High-Quality Materials: These butterfly straw toppers are soft durable environmentally friendly and BPA free to ensure long term use. Easy to Use: Keep your Stanley tumbler straw clean and hygienic with these detachable straw covers. These stanley straw covers butterfly are designed to prevent dirt and dust from entering the straw and cup. Cute Straw Covers Cup: These reusable straw covers are dust and splash proof perfect for a variety of outdoor activities including camping hiking and strolling. Each straw topper is portable and easy to use making it a great addition to your go-to stanley tumbler accessories.]