Chemist
 

A little girl comes in to the pharmacy and says hello mister pharmacist, I want to buy some ointment for my mummy...
Yes, but which ointment do you need? Says the pharmacist, this is a big shop and we have lots of them here.
It's in a little glass jar, the girl says.
Pharmacist (impatient): yes, they all come in glass jars. You'll have to give me the name of it!
Little girl; I dunno.... can't remember the name, but it smells really nice, oh, and it's got that methylamminohydradimethylphenylinyrazolonapol stuff in it.