6pcs/set Silicone Food Lid Stretch Cover 99p!
I have these myself and they are amazing and a great way to save money. I even bought a second set.
The Lids are a great way to keep your food safe and sealed. Conform to any shaped bowl whether round, square, rectangular, hexagon, etc. Made from Food-Grade silicone, Stretch Lids are dishwasher safe, washable, reusable and will not warp or leak