This is a cannabis / tobacco pipe with a twist! Made of linear extrusions in OpenSCAD, the pipe has an hourglass shape with a small hole running down the middle as per usual for a straight pipe such as a chillum or a one-hit. It also, however, has holes in the weave at each end for letting aeration occur.

Depending on how you load, light, and draw you will get different results i believe, though the device is untested. You can if you wish, purchase one at ShapeWays in glazed ceramic with the following url:

https://www.shapeways.com/shops/CreatorLes

Otherwise you can download the stl file and print or make one yourself. This would be a good project for wire art as well.

You have a good bit of creative freedom in designing your Twisty Pipe. How open the holes are and what the overall shape is are well customized to give you plenty of control. Be sure to try some shapes with detail and sides set low for quick changes, then crank them both up for a smooth result. Leave sides at three or four for a triangular or square cross-section to each strand, etc.

Note that this object must be made in a flame-proof material such as various metals, ceramic, or glass.