I designed this rainstick for my ACE project in Spanish II. The cap has the Mexican flag inscribed on the top.
Edit on May, 7: Added a simple cap that can be printed. This one has no defining decoration.
0.1 mm on the Cap and 0.3 on the body
N/A PLA, (Anything with low warping)
Use good quality PLA the cheap one's jam.
Print the Body with the opening to the top, print the Cap with the decoration facing up.
Add small pebbles and screw the cap on to the body. You can outline the contours with a fine pencil.