Q: How do I know which chamber is which?
A: On the side at each corner of the lid that contains the material pods, there is an icon that displays a number of circles. Each circle represents the number of the material pod / chamber ie 1, 2, 3 or 4. To select a specific material pod / chamber align the icon with the heat symbol. The heat symbol is located to the right of the mouthpiece and is a circle that contains wavy lines inside.