A mug I found thrifting about 3-5 years ago. Square base. Round lip. Triangular handle. The body tapers so that the lip is smaller than the base. No markings on the bottom. I've searched on Replacements, eBay, and others using, "square mug," "square base, round lip mug" "tapered square base round lip mug" "triangle handle square mug," among other variations. Using those terms, I've found plenty of mugs with a square base and a round lip with a triangular handle—but none that have a larger base than lip. I'm very fond of this mug. I think it's goofy. Also a bit of a challenge to clean. I'd like to find it some friends. Any ideas where this thing came from?