Tupperware was developed in 1946 by Earl Silas Tupper (1907-1983) in the USA. He developed plastic containers used in households to contain food and keep it airtight. The formerly patented “burping seal” is a famous aspect of Tupperware, which distinguished it from competitors.
Kori should listen to Amanda when she gives advice about Tupperware. Otherwise she will be replaced by Tupperware.