For every four San Miguel beers you buy in Bangkok, you get a FREE KNIFE!!!
Turns out the lost art of the buyback is not dead, although the people benefiting from it may soon be, as they've just been given a small, dull knife in a semi-lawless nation, and have been drinking a bunch. In the promotion of the century, a bar in Bangkok is giving away "Free 1 Swiss Knife" with the purchase of four San Miguel bottles. It's like a sandwich punch-card, except that final sandwich is supposed to have a toothpick buried somewhere inside it.