Hi, I recently made a 'travel' bong, it's very small and unlike most homemade bongs, it is not a small bottle with a pen. Although you will probably have to compromise on the materials, as I used some things that I just happened to have, this is what you will need: Tiny honey/jam jar (about 3.5 cm tall) Wrench socket Metal pen cap, with a small hole at the pointy end (don't ask me why there is one there, you will probably have to use a pen) Plastic straw (I used a very durable one I got from a slush puppy) Insulation tape Sharp, durable knife I started by removing the metallic lid of the jar. I made two equidistant holes in the top, and enlarged each one according to the size of the straw and pen lid/pen. I then attached my pen lid/pen to the socket with insulation tape to form the downstem. Next, I placed the straw in one of the holes, however only so the end is just pointing through the lid. The downstem I pushed right down through the lid, so that the bottom would almost touch the bottom of the jam jar. Finally, I filled the jam jar with some water, about 3/5 of the way, and placed the lid on. I filled the socket with some green, and blazed up, using the straw as a toke tube. If you want to achieve that carb effect, unscrew the lid carefully. Here is a picture of the finished bong, at about 10 cm high.
