Airtight 1/6 Gastronorm Silicone Lid: Airtight Silicone Lid for use with any 1/6 GN container - glass,plastic or stainless steel: Airtight Silicone Lid suitable for use with any 1/9 GN container - glass,ceramic, plastic or stainless steel with rounded edges. Strong enough for stacking. Diswasher, Microvave, Oven and Freezer safe -40C to +200C.