JetBoil's JetPower fuel fits nicely into the JetBoil Zip when turned upside down and on top of all other parts. The larger fuel does canisters do not fit.
Dimensions: 7cm tall x 9cm diameter
Fuel capacity: 100g (approx 12L of boiled water)
Gross weight 199g
Dimensions: 10cm tall x 11cm diameter
Fuel capacity: 230g (approx 24L of boiled water)
Gross weight 380g