50 parties. 50 themes. 50 weeks. In a row. In the studio. No sponsors. No strangers.Modeled after lids on paint cans, the lids of Tupperware food storage containers are to be closed with a “burp” to create a partial vacuum and make the seal tight. You push the center of the Tupperware lid while pushing the edge of the lid onto the container’s lip.
Source: http://www.tupperware-blog.com/