Asked him to please remove his open canister of kerosene and kerosene heater and take away.Instead he snuck out the back and left the kerosene heater AGAINST the gas hot water heater[ kerosene heater turned off, of course] With kerosene still in it.

Micro-apartments might be the next big thing but this sort of canister housing probably isn't.

He kept showing me that he could see his breath, and he had a thermometer to show me (repeatedly) that it was only 50 degrees inside the house.He also had a temper tantrum because he vacuumed the rug and got 1/2 a canister of "dirt".

I'm an advocate of the hood over the range for a lot of reasons and I recommend installing fire suppression canisters as well (cost $60 to $100):  https://www.youtube.com/watch?

You take a canister of animal pepper spray with you -- you can get one on Amazon. 

@Tanya F.Kohler's 1.28usg toilets use a canister flush valve.  

I get the cheapest stuff amazon has and have my cleaners put it in a canister marked “cafe” so it looks fancy.

:idea: I guess I'll just buy a bunch of Sterno canisters so I can SAY that I live in a loft!

They should have fired canisters of tear gas and maybe some stun/flash bang grenades before attempting to board.

When he moved out, he did one pass of the vacuum in his room and completely filled the canister with debris!