Have you ever took a glass after drinking something and analysed it to see what would be left

Question: Have you ever took a glass after drinking something and analysed it to see what would be left
- Keywords:
  analyse,
  drink,
  glass
Asked by The wonder guy(DLang?) to Annette on 17 Nov 2016.
- Annette Neill answered on 17 Nov 2016:
  
  No actually -but it would be a good experiment for sure! Your mouth has lots of bacteria that are useful but some not so nice ones!

Question: Have you ever took a glass after drinking something and analysed it to see what would be left