Soft drinks only

Sitting in the wonderful Vinoteca restaurant in St John Street, the other day (favourite place, next to where I used to work), I found myself looking at the other eating places across the street. Sandwiched between a pizza place and another pizza place (it's all about context...) was what appears to be the St Clements Dental Cafe. Intriguing... lots of calcium rich foods, nothing with sugar, definitely no toffee? Perhaps the food is like those cat biscuits they claim have ingredients that clean your cat's teeth.
You've guessed by now that the missing letter was in fact an 'r'.