Squiggly lines indicate that your container is microwave safe. This symbol can vary a lot ... which range from 1 to 7, Tupperware has a handy chart. At the end of the day, not every plastic ...

If your Tupperware has a symbol with wavy lines or a microwave with wavy lines, you can use it in the microwave without fear. Most containers have the Tupperware symbol of three arrows forming a ...

and serving solutions for the kitchen and home under the Tupperware brand name, as well as a line of cookware, knives, microwave products, microfiber textiles, water-filtration related items ...