Keep your coffees, teas, and cocoas piping hot and your juices and cocktails refreshingly cool! Create an airtight seal by simply placing your CV drink cover on any smooth-rimmed container. • Works on smooth-rimmed containers made of glass, plastic, stainless steel, ceramic, and wood • Protect beverages from insects, pollen, and falling leaves during outdoor dining • Guard against splatters in the microwave • Food grade silicone • Free from BPA, phthalates, leads, and latex