Over-the-toilet shelf in SUS 304 stainless mounted on the tank lid, no drilling

Over-the-Toilet Shelf, No-Drill SUS 304 Stainless Rack, 13.8 or 15.7 in Wide

$25.99

Fits if: the flat top of a standard toilet tank, 13.8 to 15.7 in (35 to 40 cm) wide - measure the lid before ordering

Not for: tanks with the flush button on the lid itself, or for lids narrower than 13.8 in (35 cm)

Size: compact 13.8 x 5.9 x 4.7 in (35 x 15 x 12 cm); Wide 15.7 x 5.9 x 4.7 in (40 x 15 x 12 cm)

Load: holds bottles, jars, soap dispensers and a spare roll on the shelf - raised rails front and back keep tall bottles upright

The bottles have nowhere to go. The tank lid is right there.

Most over-the-toilet storage is a 60-inch tower that stands on the floor, leans on adhesive pads, and gets top-heavy the moment you load the top shelf. This one skips all of that. It sits on the tank lid, mounts with no drilling, and keeps everything within arm's reach of the seat.

Because it is only 4.7 in tall, the centre of gravity stays low. Nothing to anchor into the wall, nothing to tip over when someone bumps it in the dark.

Why it works

SUS 304 stainless, not painted carbon steel - the bathroom is the worst room in the house for metal. Steam, splashes, and cleaner spray all sit on the surface. 304 stainless handles that without the coating flaking off the way powder-coated carbon steel does.
No-drill mount, renter-safe - adhesive pads hold it; a screw kit is in the box if you own the place and would rather fix it permanently.
Raised rails front and back - tall shampoo bottles stand up instead of leaning into each other.
Open base, no standing water - the hollow frame lets water drain and air move, so nothing sits wet.
Two widths - measure your tank lid first and pick the one that clears the flush button.