I was one of the lucky ones to get this in the Christmas sale for 90% off, so I got it for the really good price of only 83 cents. Imagine - including delivery!!!
It's exactly as described on the MITB web page. It's the same shape and size as a regular milk glass (made of plastic), with a white plastic insert that hides the batteries. It takes 3 AAA batteries (not included), and you insert them from underneath. Just like the pictures on the MITB web page, there are several different colours, blending into each other as the colour changes.
The box is the same too, except my box doesn't have cut-outs for the ears and feet like shown on MITB's page. Also, unlike the MITB description, when you tip the glass over it doesn't switch off, but that's not a big deal.
So... in summary, nice quirky product, really good price, and free delivery. Nice one, MITB!