If you've ever bought an inexpensive small bento box at a 100 yen shop or via eBay, the chances are pretty high that it was made by one company, Nakano Co.. They are the ones responsible for the bento boxes carrying the mysterious Lube Sheep logo.
After visiting their company web site, I still have no idea what it actually means, and it probably doesnt mean anything at all - it's just a cute piece of Japanglish that someone in the company thought sounded good. (Yes, I know it sounds a bit dirty, but let's try not to go there.)