Be a Scientist: Bottle Electricity.

Step 4 Wrap the outside.

Now cover the outside of the cannister. Again, glue-stick is enough to hold the foil in place. Again, avoid rough edges, and make sure the foil doesn't get in the way of the lid.

Cut a second piece of wire about 4-5cm long and strip both ends.

Tape one end to the foil on the outside, so that the other end can be easily curved around to meet the other wire (or the discharge loop if you made one).

(Optional step: wrap the whole thing in sticky tape to prevent tears and scuffs.)