What is the BJJ Box?. The BJJ Box is a way for people like yourself to get awesome jiu jitsu products & samples delivered straight to your door each and every month for one low cost! Sample all sorts of soaps, scrubs, body washes, and other great products. Great tasting healthy foods. . Array of different types of apparel. Samples and full-size products. Be surprised every month with different BJJ specific items. Even get products every now and then that are a “pre-release” and not yet available for the public to purchase.