Bicycle Defense Kit

Step 4 Fill Stink Bomb and Brake Fluid Chambers

This is where the syringe comes in handy.  Note how many milliliters of material fit in a contact lens case to make it easier for filling multiple containers.  Close the lids tightly, rinse in between as well as afterwards, and of course make it clear that the syringe and lens cases shouldn't be used for non-bike-defense purposes...