How to assemble The Exchange Box
How to package the exchanges
Verify the canisters are empty by depressing the center pin with a spoon to remove any remaining CO2.
Twist on provided caps to seal the canisters. If you have thrown away your caps, no worries... if the canisters are empty, continue to step 3.
Place included return label over the existing label. Tape the box closed and place in the mailbox.