PrintDry Filament Feed System

Update: I have remixed this into a new version which has some improvements. See it here
https://www.thingiverse.com/thing:2899347

PrintDry recently completed a kickstarter to begin production of a container to hold a single spool of filament and keep it dry. They work pretty well. The containers, unfortunately have no way of feeding filament out, so you have to remove the filament for printing, exposing it to moisture. This is especially problematic with polycarbonate and nylon filament