This dice cup is the only one on the market having a regular shape. Most other dice cups are straight. One of the first to use a non-straight dice cup was the great Pepe Carroll with his wonderful dice stacking routine. You do not only receive the dice cup but also four (4) dice, to learn how to stack them. Finally, you will also have access to an online video with the explanation of basic stacking techniques and of some magic tricks with stacking dice. This video was filmed with a transparent dice box, so that everything that goes on inside it, in order to stack the dice, may be fully appreciated. You receive: Dice stacking Cup Pro, 4 dice, online video with more than 20 minutes of instructions (Spanish and English).