Our Cover star glass lids are essential for a busy kitchen as they can be used on a range of cookware. Just match the size of the lid to your existing pots and pans and you will speed up the cooking p more→rocess and reduce energy loss. The lids are oven safe as they’re made from special, heat resistant borosilicate glass. Having a pure glass lid enables you to keep an eye on your cooking without removal of the lid which will cause energy loss. • Ovenproof • Save energy • Prevent splashes • Free view