Foods containing water expand when frozen. Leave sufficient space in container when freezing to allow for expansion. Containers can become stiff after freezing. Allow the container to rest for a few minutes at room temperature or run under warm water before opening or microwaving.

Sistema® Microwave™ containers can be used in a microwave (with vent open), refrigerator, or freezer. Reheating and/or melting butter or foods high in salt, oil, fat or sugar content (i.e. chocolate, candies, syrup) could lead to severe damage and potentially melt the container. To prevent staining and blistering, avoid heating foods like tomato-based sauces, beetroot, curries, food seasoned with the herb turmeric, or foods with high fat or high sugar content.

Follow the recommended food storage directions, use, or heating instructions, based on the knowledge about the food or the information on the food label. Also follow the microwave manufacturer’s recommendation when defrosting or reheating foods. These containers are not intended for cooking. Excessive reheating time in the microwave may damage the container. Do not use utensils with sharp edges (e.g., knives) in the container. They could scratch or scuff the container surface.

These containers may stain when reheating foods like tomato-based sauces, beetroot, curries, food seasoned with the herb turmeric, or foods with high fat or high sugar content.When microwaving, remove the lid to allow steam to vent. To prevent splattering, cover with a paper towel. Sealing plastic lids while heating may create extra pressure causing the lid to warp or create dangerous steam build-up. As this product is not leak-proof, extra care must be observed when transporting food that contains any form of liquid. Avoid using plastic wrap on or inside the container during microwave use. The plastic wrap could heat, melt, and adhere to the container walls.