Drug question

[Bob The Mercenary]

I do deliveries for my dad's pharmacy during the day and one regular customer we have has a habit of ordering 5 cases of rubbing alcohol per month. That's 60 bottles of rubbing alcohol a month. Only two people live in their apartment and they've been ordering it like this for more than a year. I'm beginning to wonder what they could possibly be using these huge orders for.

I've already looked into the possibility of them purchasing the stuff for other places such as school nurse's offices and first aid squads, but we do all deliveries direct to those places. Is there some way to produce or refine some sort of street drug by using rubbing alcohol? It'd be cool if I could break a story like that.