I used to to go around to shops like Pier-One, places that would have vases. Find one that looks like it'd work, bring it home and go to work with a glass drill bit, smooth out the edges, buy a grommet, stem and bowl, you have yourself a nice glass bong for cheap.
Im going to try to make a bong out of a vase. What drill bit should i use, i know theres all those custom specific drill bits for drilling special surfaces
you could always tap the glass with a nail and file away at the hole until its big enough if you dont find out.
If you get a dremel tool with a glass drill bit it wil run yah $68-$80 but i made a few bongs and resold them to friends for $20 a bong without the stem. so you could make your money back if your friends want a bong, just make sure its good if your going to sell it
I had a friend a long time ago who had a cylinder style vaccuum cleaner that they made a monster bong out of - they just ran it backwards and it went through a big water jug - but it would go through ALOT of weed, but for a party, it was great! Run it for like a few seconds and the jug would be full and people could smoke at will - it was more like a big ass vapo that you had to add the fire to.
If you get a nice vase or cool glass bottle (some german beer) And get a Diamond tip Bit for your drill, Just drill where you want your slide to be.. As for a slide... I have actualy made a slide out of terracotta clay that i let harden....Works pretty good too