1. Fill the bottle with cold water. Leave 1/5 empty.
2. Attach the adapter to the CO2 tank firmly.
3. Squeeze air out and tighten BubbleCap to the water bottle.
4-6. Add the carbon dioxide to the water with a lever movement, until you hear the gas escaping from the three pressure relief valve holes or no more bubbles are created in the water.
7. Mix the carbon dioxide in the water. Repeat the addition of gas 4-5 times and shake efficiently in between. (4.-7.)