It looks like the text underneath the robots reads "GIANT ROBOT". Giant Robot is a bi-monthly magazine of Asian and Asian American popular culture. While they currently don't have this shirt for sale in their store, a similar design can be found at Polar Panda.
No one still seems to be 100% sure what the robots are, but it looks like it may be Transformers after all, based on this ad found by mixedtapex16.
To celebrate the find, I have put all the Slusho Robots shirts on SALE.
On the Lost - The Complete First Season DVD set, the bonus disk contains the documentary "Welcome to Oahu: The Making of The Pilot". In this featurette, JJ Abrams can been seen wearing various Comic/Anime T-shirts. One of the shirts is this Robots design, which looks like it may be a vintage Transformersor Robotech ...?
This may have been the inspiration for the Slusho flavor robots.
* Thanks to Red Walrus for finding this, and to TinaG222 for the screenshot.
Since I haven't been able to find that shirt anywhere, I have designed a Slusho Flavor Robots shirt in the same style. These are obviously "unofficial", so they may be available for limited time - get 'em while they're hot!
There are two styles: Chocolate Rage, which is closest to the JJ shirt, and 1-18-08 Robots which has all the robots at full size.
* I was going to make one for each flavor, but the way CafePress works, you have to set up a new store for each design - which is a lot of work. However, if you really want a Blueberry Zoom, Banana Anime, etc, or you want a different product (like a mouse pad or something) just email me and I'll add it.
Become like the masters, Noriko and Ganu - GET your own FLAVOR T-SHIRT for a unique SLUSHO! experience!!
Malemunyon at Unfiction has found the origin of the mysterious Robot shirt.
No one still seems to be 100% sure what the robots are, but it looks like it may be Transformers after all, based on this ad found by mixedtapex16.
DVD set, the bonus disk contains the documentary "
or 
...?
