Simplehuman Inverted-Bottle Refill Mount with Iris Grip

Holds an off-the-shelf shampoo, conditioner, or body wash bottle upside-down over a wall-mounted simplehuman pump dispenser so the bottle drains into the dispenser by gravity — no decanting, no funnel, no dedicated refill cap. A six-blade iris diaphragm grips the bottle's neck, so almost any bottle you already own fits.

**Key Features**
- Six-blade iris diaphragm — sliding wedge blades clamp around the bottle neck, fitting a wide range of off-the-shelf shampoo, conditioner, and body wash bottles.
- Snaps onto the top of a wall-mounted simplehuman pump dispenser body (71 mm inner / 76 mm outer).
- Gear-toothed grip rim on the cover and the support — easy to twist with wet hands.
- Captive-tab blades that drop into the plate's pocketed slots and can't lift back out once the cover is on — assembly is tool-free.

**Parts**
Prints as four part types: one support, one plate, one cover, and six blades:
- `support.stl` — the housing that snaps onto the dispenser.
- `diaphragm_plate.stl` — the slotted disc that the blades slide in.
- `blade.stl` — print 6×; each blade is a wedge with a captive tab and a pivot pin.
- `cover.stl` — the front cap with six stadium-shaped pin slots and the gear grip rim.

**Assembly tips**
1. Orient the diaphragm plate so its slots extend counterclockwise when viewed from the top.
2. Slide each blade into a slot and park it at the slot's outer end — the blades overlap when seated, so all six only fit if each is held at the outer edge until the last one…