【Versatile and Stylish】These silicone straw covers come in 10 adorable styles with a 0.4" (10mm) inner diameter, suitable for Stanley 30oz/40oz tumbler straws and most 0.4" (10mm) diameter drinking straws. Before purchasing, please verify the straw's diameter. 【Mess-Free and Hygienic】Compatible with Stanley cups, these silicone straw toppers seal your straw to prevent dust from entering when not in use or drinks from spilling during movement. Compact and portable, perfect for parties, camping, hiking, and other outdoor activities. 【Eco-Friendly and Durable】Crafted from high-quality silicone, these straw tip covers are odorless, soft, and designed for long-term use. They are easy to clean by hand or in the dishwasher. 【Convenient Design】The soft 0.4inch (10mm) straw cover is easy to put on and take off, securely attaching to the straw. When you open the straw cap to drink, they hang on the side of the straw, preventing loss. Note: Straws are not included in the package. 【Creative and Practical】The unique cartoon shape of these straw toppers adds a fun touch to your cup, making it easy to identify and keeping your straw clean. Suitable for silicone, glass, and stainless steel straws. Ideal gifts for friends and family. 10 PCS Straw Covers Cap, Straw Cover for Stanley 30&40 Oz Tumbler, Silicone Straw Topper Cute Straw Caps in Various Shapes