How long can cooked pasta in Tupperware containers be left out un-refrigerated - Overnight?

No, leaving cooked pasta in Tupperware containers out un-refrigerated overnight is not safe and can lead to bacterial growth and foodborne illnesses.

According to the United States Department of Agriculture (USDA), cooked pasta should be refrigerated within two hours of cooking to prevent the growth of harmful bacteria. At room temperature, bacteria can multiply rapidly and cause food to become unsafe to consume.

Therefore, it's essential to refrigerate cooked pasta promptly and avoid leaving it out overnight or for extended periods at room temperature.