- How to make a smoke bomb with bottle caps - Take the bottle cap off of a two liter soda bottle. Then cut the heads off STRIKE ANYWHERE matches. Take them and pack them in real tight in the cap so that they come a little above the edge. Diagram: matches = # ##### cap = * ####### ********* * * ********* Then you place a beer bottle cap on top of them so that one end of it touches the two-liter cap. One side should have a gap bettween the caps about two to three milimeters high. Then take tape and secure the caps together real tight leaving a little space in bettween the tape on the raised side of the caps about 2mm x 2mm. DO NOT PUT TO MUCH TAPE ON!!!!!! You have to put just the right amount. If you put to much on it wil absorb the shock of you throwing it and therefor not go off. If you do not put enough the pressure the matches make as they burn will pop in in half. Once you have followed these simple but confusing instructions, Throw it real hard against a real hard surface. --------Vortex