This isn't really a bag. It's Sonic tape! (Insert horrible pun about cutting through the red tape here)

This stuff would be so cool if you could actually BUY it. I think part of the appeal of Japanese items is that there is often so much detail in everything. Packages are actually cool. Stuff is not covered in "MAX'S HOUSE O' JUNK" so that you throw it out the second you get it home. It's far more memorable to have something that reflects the interest of the buyer AS WELL AS the store or company, rather then trying to wave only the boring store name at everyone. Chances are, they'll keep the interesting item that came with their purchase, even if it's 'co sponsored' with the store.