I stopped off at a factory I used to work at and they had these 20 litre odd containers, ideal for keeping pure in for your trolley/backpack. I can have them, took 4 today, now that title is what was in them, Anti freeze in effect bloke said. Obviously im careful in cleaning them out, keep away from cats etc, but would you say just thoroughly washout/rise with hot fairy liquid and water? Heard some horror stories on here of containers that dont seem able to keep pure at 0 - 3 after change of use. Handy to know, cheers all.