This is a screw together bong, inspired by the products lifted innovations is selling. This differs from the lifted innovations product because it is meant to be used with an 18mm male -> 14mm female downstem. I have attached a picture to show the length of downstem required.
This bong has a activated carbon filter (you can find this where aquarium components are sold) section just below the mouthpiece section, which makes the rips oh so smooth.
Below the activated carbon section is the ice chamber. Below that is the base.
I had trouble getting the base to hold water, it slowly leaked through the PLA, I ended up printing the base with 100% infill and it solved the problem. I used concentric top and bottom layers, as well as concentric infill.