In the 80's there was an issue of Dragon where a similar product was reviewed. It was called the Fair Shake Dice Device, but that was a clunky wooden think that was a bitch to transport. I know because I built my own as my project for 8th grade woodshop class. (Yes, I am that big of a dork.) This looks like it could disassemble to travel flat, which would explain why it's called the portable dice tower. That Dragon issue also reviewed a couple of other dice oddities. Dragonbone was a handheld LED thingy that generated random numbers electronically. They were apparently built solidly, as I've heard of people who still use their Dragonbone two decades later. Then there was The D4 That Rolls, a d8 marked 1-4 twice. That's a great idea but I wouldn't use them today because, outside of casino d6s, 80's dice had much dodgier quality controls than models nowadays. I have seen some d12s marked with 1 to 4 pips on each side, but I've never found them priced cheap enough where I would feel justified in replacing my d4s with them. Over on Gamecraft someone highly recommended I get some of the new prism-shaped d4s from Crystal Caste. I just got done replacing my d4s, so I'd feel a little silly doing so again.
"Man, is there anything Jeff CAN'T do when it comes to gaming? This guy is like a critical 20 every roll. Jeff can bite the heads offa five game geeks, including their sorry-ass DM, and spit 'em into a large duffel bag ONE AT A TIME!...that's just the kind of messed up bastard he is! You think yer a gamer, punk? Well..do ya? Jeff will depants your weasel-ass right in front of your grandma."