Pull-out drawers beat stacking every time.

For under-sink storage, pull-out drawers or tiered shelves are the most efficient vertical solution because they let you access everything without rummaging.

Stacking products under the sink is a disaster waiting to happen. You grab the thing on the bottom and everything above it becomes a game of Jenga. Worse, you can’t even see what’s back there. The whole point of using vertical space is to make every inch accessible.

The best approach is a pull-out drawer system that fits around your pipes. These come in U-shapes or with cutouts, and they slide out so you see every bottle and sponge at once. If your cabinet is oddly shaped, a set of adjustable tiered shelves (the kind that step up like stairs) works nearly as well. You can also mount a tension rod vertically near the door to hang spray bottles — that uses dead air and keeps them off the shelf entirely.

Whatever you pick, measure your pipe clearance first. And skip the