5 meters of 1/8″ wide Maker Tape® with conductive adhesive.
Maker Tape® is a conductive nylon cloth tape, with conductive adhesive too. Use it in place of copper tape when building paper circuits. The connections are stronger and longer lasting, with much lower resistance. Plus, since it’s fabric, you can use it over folds and bumps without worry of it cracking and your circuit failing. And the narrow, 1/8″ wide tape is much easier to curve and work with.