The rennet tablets have a very long shelf life if kept sealed and not exposed to heat. Junket tablets are a common source of rennet for home cheese makers.
Junket is often served with a sprinkling of grated nutmeg on top.
The word "junket" (non-copyrighted, non-trademarked) refers to a form of bribery/corruption whereby entities offer services or privileges in the expectation of winning "hearts and minds". Compare movie junket.