Microppose Silicone Jar Covers, Pack of 10Perfect for sterilizing wide mouth jar lids, these autoclavable silicone jar covers are an economical alternative to foil when preserving the lids, filters, and injection pots while sterilizing for mycology culture work. Preserve jar lids, filters, and injection ports when sterilizing and autoclaving with silicone jar covers. Used as a more effective alternative to foil saving money over time and creating significantly less waste. These jar covers are