Bulu Box has a new “Build My Own Box” feature. This is only limited to 500 people, so jump on this deal. Bulu box. a vitamin and supplement sample box. Bulu Box includes various vitamins and supplements to help you lead a healthy lifestyle. Each box contains 4 to 5 premium samples plus lifestyle extras from time to time. There is a regular Bulu box and a weight loss Bulu Box. The Bulu Weight Loss Box was designed with the specific goal of weight loss in mind. Each box contains 4 to 5 premium weight loss items such as vitamin and supplement samples, fitness gear and healthy eating tools.