How do you dispose of used blades

I chuck my used blades in a cheap metal tin. When its full , do I just throw the entire tin into the bin? are there any extra safety measures that I should follow?
 
Hiya,

As a carryover habit from my childhood prestidigitation years I still keep 4-5 used DE blades under my tongue. It's just in case I even now might someday need some to perform with and they are no trouble carrying around in that made to order spot in my mouth.

Y'all have probably seen this illusion performed before, but few do it better than The Amazing Jonathan.