COSMOS Set of 6 Different Sizes Silicone Stretchable, Reusable, Durable Cover Lids for Cans, Containers, Bowls, Cups, Pots, Mugs Super stretchable and will cover any shape such as round, square, oblong or rectangle. Create a perfect seal on glass, plastic or metal containers for secure fit to keep food fresher and longer. Ideal for storing leftovers, unfinished drinks or freshly cut fruits and vegetables. 6 different diameter silicone lids: 2-1/2"; 3-3/4; 4-1/2"; 5-3/4"; 6-1/2"; 8-1/4"; will fit any 2-1/2" - 10" containers. Made of food grade silicone.