A bottle stand for hydroponics. Screw in a 2 litre bottle and stand in your container and once submerged the water stops coming out until the plants use it up.

Also a plant pot holder for the 3dponics square plant pot.

No idea if this is the correct way to do hydroponics but i was struggling with things that used floaters and valves to work but my chilli plants seem to like it. (see photo)

I have put these both in a tub and the plant pot holder holds the pot just out of the water whilst the stand allows enough water out to cover the roots.