Milk magically appeared on your front porch in glass bottles, shining brightly at the front door. The magic was the milkman, who had a crew cut, wore a white uniform and drove a big, white milk truck.

The next time you're at a thrift store, keep an eye out for milk glass -- depending on the piece, it could be very valuable.

It doesn’t look or taste like cocoa-colored chocolate, so what is this sweet treat? We dug into its history to find out ...