Hydroponics nutrient solution refiller (for sprout tray)

This part is for used together with "Bottle Connector with funnel by cgongora69" (http://www.thingiverse.com/thing:902607) to maintain nutrient solution level in sprout tray at 5-6mm or 12mm height.

** UPDATE (6 Sep 2015) : I've added the 12mm version. Recommed to print this version if you use sponge as grow medium.