Using these covers is super easy. Just place them on your 6 or 8 qt. containers and press gently to seal. The easy - seal design ensures a tight fit. When you need to access the food, simply lift the cover off. For maintenance, you can throw them in the dishwasher as they're dishwasher - safe. This will keep them clean and ready for the next use. Stack them up when not in use to save space. Before buying, always double - check that the cover fits your specific food containers. These covers are tough and can withstand impacts, grease, and chemicals, but try to avoid using them with extremely sharp objects to prevent damage.