Solve the Puzzle: What Makes the Tupperware Lid Sound?

The answer to the crossword question “Tupperware lid sound is BURP” is most likely “airtight“. Tupperware is a brand of food storage containers that are renowned for their airtight seal, which keeps food fresher for longer. When you close a Tupperware container, it creates a vacuum that sucks out all the air, resulting in a satisfying “burp” sound as the air rushes back in when you open the container. This sound is synonymous with Tupperware, and is a sign that the container is sealed properly. Therefore, the answer to this crossword question is likely to be “airtight“, as it describes the quality of the Tupperware seal that produces the “burp” sound.