What are these? Stretchy cotton bowl covers to replace cling film or tin foil. Available as a set of three or as a single large cover. Covers bowl up to 30cm in diameter. What they are made from? Cotton and natural rubber. 100% biodegradable. Why are they fabulous? They provide a stylish replacement for cling film and keep food fresh at the same time! Environmentally friendly, plastic-free, 100% biodegradable, and reusable. How to care for them... Wash on cool and dry flat.