The DeWalt Pro Organizer DWST14925, sold at Home Depot, is useful (and quite inexpensive on sale) but some may find they'd rather have more numerous, smaller partitions than the removable cups allow. This print replaces one of the smaller removable cups with one that's divided in half. It fits securely in any location and orientation that the original cup would fit.
The shape of this cup differs slightly from the DeWalt original; some changes to the external shape were made to eliminate the need for supports on the upper section. It's still fully compatible and won't interfere with adjacent cups. Supports are still required underneath, due to the way the DeWalt Pro Organizer uses the feet of the cup for retention.