The newly-developed and patented vacuum lid for the B/R/K Pressure Cooking System creates a partial vacuum inside pots and pans, enabling food already prepared to be kept safely for up to 2 weeks. Imagine coming home after a long day of work and knowing you have a wonderful meal ready to go that you pepared up to two weeks ahead of time! The lid can also be used for conventional cooking. Marinating meats under vacuum conditions cause the marinade to penetrate the meat or fish much more quickly and effectively. You"ll find this ingeneous lid to be a must have in your kitchen.