Sandwich-box T-shirt

I've been keeping this one to myself for a while, but since I'll never actually get around to putting it into practice, here it is.

Sandwiches, packaged up in those cute triangular boxes, are pretty expensive for what they are. You could easily buy a cheap T-shirt for the same amount of money. So it's obviously entirely logical to shrink-wrap T-shirts into those same cute little triangular boxes and sell them at music festivals, etc.? I'm thinking this would have a core market of festival goers who've had their last few clean clothes stolen, or disguised as potatoes. You could have some cute graphic on the front with a picture of a half eaten sandwich, or a slogan ("Chicken Club", maybe, or "Eat me", or "I could have eaten this", or "My boyfriend went off to get some lunch, and all he came back with was this lousy t-shirt", etc.)

Or even more cunningly, the t-shirt could have a pattern which, once it was folded and in the box, made it look like a real sandwich.