The water will boil faster if you use a lid, in that way you save time and electricity. A lid is also indispensable for your slow cooking on the stove or in the oven - without a lid, the juices will evaporate too fast and the ingredients will dry out. With a glass lid, you can monitor your cooking without lifting the lid.
Did you smash your glass lid? Don't worry, you'll find separate lids in many sizes on this page.
Nice to know! all lids on this page are ovensafe up to 250°C.