【COMPATIBLE SIZE】：The Halloween silicone straw cover caps compatible with 30&40 Oz Stanley Quencher H2.0 Tumbler with Handle & Stanley Adventure Quencher Travel Tumbler straw. Also suitable for all types of straws with an outer diameter of 10 mm. Our reusable straw topper covers are tight enough not to fall off easily. 【UNIQUE DESIGN STRAW COVER CAP】: Our mini Halloween straw toppers have a unique design with Horror Halloween styles , which make your straws or cups more exquisite. so many intersting and horror characters for you choose, using our straw tip lids to welcome the Halloween day, share happiness with your family and friends. 【Dust-proof and Leak-proof】: Our portable halloween straw covers can perfectly seal your straw and prevent unclean things from entering the straw. Not only can it be used as a decorative halloween straw topper, but it is also dust-proof and splash-proof when not drinking, making drinking more assured. Exquisite and compact, it is more convenient to carry. 【EASY to USE】The soft 10mm drinking Straw toppers for tumblers easy to put on and take off, it attaches to the straw and when you open the straw cap to drink, they hang on the side of the straw so you don't get lost. Please note that our packaging does not include straws. 【Perfect Gift】: With a novel design, it has a cute Halloween style, making your straw or cup more exquisite. Suitable as a beautiful gift for friends on Halloween, birthday parties, straw parties and outdoor activities. Product includes: 5 cute halloween straw cover caps. Our halloween straw toppers have a diameter of 10mm (0.4in) and are designed to be perfectly compatible with the Stanley 40 oz/30 oz tumbler with handle, and for the simple modern 40 oz tumbler with straw, they also fit all large-diameter long straws with a diameter of 9-10mm,