Speed stacking, or sport stacking, is a sport where cups are stacked in a specific pattern as fast as possible. Points are given for speed and accuracy.

The following general criteria apply to all RecordSetter record attempts involving speed stacking:

- stacks must stay balanced throughout the attempt
- cups must be nested down into a single stack in the order they were upstacked
- may only work on one stack at a time
- no adhesives are permitted