GoSili Cup Cover Drink Protector with Reusable Drinking Straws

The silicone lids are designed to stretch and fit most standard cups and glasses ranging from 12 to 20 ounces. Because the material is flexible, they work well on a variety of shapes, including tumblers, coffee cups, and mason jars.

They create a secure, virtually spill-resistant seal, meaning they will prevent minor splashes and keep your drink contained if the cup is tipped over briefly. However, they are not designed to be 100% leak-proof like a screw-top travel mug, so you shouldn't toss a full cup into a bag.

Both the lids and the straws are dishwasher safe. For a deeper clean or sterilization, you can also hand wash them with warm soapy water or boil them safely, as they are made from high-quality, heat-resistant platinum silicone.

The straw hole is designed to fit the included 0.6 cm diameter silicone straws snugly. While you might be able to squeeze other thin straws through, the hole is specifically optimized for the GoSili straws to maintain the seal.

Yes, the 100% European-grade platinum silicone is heat-resistant and food-safe. It is perfectly fine to use these covers on cups containing hot beverages like coffee or tea.