I guess from living in Canada and a 50 gram tin costs around 40$ tossing a tin has never crossed my mind.
I once witnessed an infamous Canadian lighting a 1/4 oz block of hashish with a (Canadian) $100.00 bill.
He let that bill burn to his finger tips and tossed out the window @ Rochdale. By the time he blew it out and took a toke, it got passed around to about 4 people and was done. He went on to become one of Canada's more famous convicted drug smugglers. His name, Bob "Rosy" Rowbotham.
http://www.cannabisculture.com/articles/32.html