Well, was bored in class and decided to design a homemade. Heres what i came up with, im perfectly happy with my spoon and dont wanna have to hide a homemade bong so I prob wont make it, itd be cool if someone else wanted to tho. Anyways heres a quick design in paint i drew up. Everything sealed with hot glue, using your bowl of choice. For the filter, itd prob be easiest to cut the bottle in half..then sandwich the filter between the 2 peices then hot glue around the side to connect it back together. So whatcha think?
Its been used in MANY homemades and i thnk its a way better alternative to pen tubes which is what seems to be the norm around here. But hey, you can use metal too..Just get a drill press for the holes, they have the same parts in steel and brass at home depot aswell.
