Anatomy of a cup
The world's fastest stackers use Speed Stacks gear. They know the best cup equals the best performance. Here's what sets Speed Stacks cups apart:
The special shoulder with ribs gives just the right separation between cups. When seated on top of the other they simply don't stick. One cup can be picked up off another leaving that cup behind; one cup can be dropped out of a set of cups from the bottom simply by releasing the finger holding it.
The reinforced lip of the cup is just the right size, not too pronounced, with a smooth, clean finish.
Inside of Cup is Smooth for Less Friction
The inside surface of a Speed Stack is smooth for less friction
The 3 holes in the top are very important to fast stacking. These holes allow air to escape quickly when downstacking.
Speed Stacks have "memory". If a single cup is accidentally squeezed at the lip it will bounce back into its round shape.
The outside surface of each Speed Stack cup has been textured for a terrific feel and grip.