Bring it to a recycling center
by recycling it :)
The best way to dispose of a cartridge is to recycle it, if you are not able to get a refill for it. You will take it to any recycling facility to dispose of it.
The only way to drain all the coolant is to unhook the bottom radiator hose. The radiator does NOT have a drain vale.
The coolant enters the engine by way of the lower radiator hose and exits the engine by way of the upper radiator hose.
Coolant always goes in the top of the radiator.
pour it over a fire
Easiest way to drain the radiator is to remove the lower coolant hose.
As coolant cycles through the engine, it absorbs heat from the engine, after which, it continues through the cooling system back to the radiator. As the coolant passes through the radiator, the heat is exchanged to the ambient air by way of airflow through the radiator fins (this is why it's important not to bend the radiator fins).
Read this: http://www.ehow.com/how_7546321_dispose-neon-lights.html
the correct way to dispose of a flag respectfully is by burning it.
Atoz radiator doesn't have a drain plug. The only way to drain the coolant by removing its bottom radiator hose
The coolant leaves the radiator by way of the lower radiator hose then enters the water pump in most automotive engines.