[Lorelai sits on the bed looking through her purse while Rory is in the bathroom.]
LORELAI: Ohh, ahhh, I struck gold! [pulling something out of her purse]
RORY: What is it?
LORELAI: Certs.
Certs is a brand of breath mint and candy made by Mondelēz International since 1956. One of the first mints to be marketed in the US, they are a fixture at drug stores and convenience stores. Despite being mints, they don’t contain any actual mint, just artificial mint flavouring, with their green colour coming from copper.
The Annotated Gilmore Girls 