Product Details This is a 5-piece straw cap set for Stanley mugs that includes a silicone straw top trim and is compatible with Stanley 30 oz and 40 oz insulated mugs with handles. The set also includes a 10mm straw cap for Stanley Mug accessories. This product is designed to be beautiful and functional, helping you create a unique personal style. Whether you use it in your daily life or display it on special occasions, this straw hat set can make your Stanley Cup more attractive. 【PERFECTLY COMPATIBLE SIZE】:The reusable straw cap fits all types of straws with an outside diameter of 10mm/0.4 inches, perfect for 30&40 ounce Stanley Quencher H2.0 nonpareil with handle and Stanley Adventure Quencher travel nonpareil straws. Straw tip caps are tight enough not to fall off easily. NOTE: Our package only includes 5 pieces of silicone straws, straws are not included. Please double check the size of the straws when purchasing! [Straw Protection] Provides a layer of protection for your straws to prevent them from breaking or being damaged. This feature ensures that you can use your straws for a long time without losing their shape or functionality. Straw protection also ensures that your straws are protected from other harmful substances, keeping you healthy and safe. 【Reusable and Easy to Clean】Our straw covers are reusable and easy to wash and clean. You can use them over and over again, making them an environmentally friendly alternative to disposable plastic straws [Dustproof] Designed to provide maximum protection for your straws against dust and other environmental factors. They help keep straws clean and safe to use at all times. The anti-dust feature also ensures the hygiene of your drinking utensils, which is vital for your health. Safe Silicone Material】 The silicone material used in the production of the straws is completely safe. It does not contain any harmful substances that could harm your health or the environment. Our priority is to ensure that you use healthy and environmentally friendly products every day. That's why we use high-quality silicone that meets all standards and regulations.