Dual-chambered beer-glasses for mixing the perfect black-and-tan

Etsy seller Matthew Cummings of Kentucky's Pretentious Beer Glass Company created a set of four cylindrical, dual-chambered beer glasses, which allows you to mix any two beers without regard to their specific gravities and without a lot of mucking around with jigs. He also takes custom orders. A set of four is $125.

Dual Beer Glass, Set of 4 (Thanks, Fipi Lele!)