The Ultra Gas cartridge can boil 0.5 litres of water in just 1 minute, with one can producing roughly 53 hot drinks - perfect for groups or longer trips. The handy fill marks show your remaining gas when placed in water, making it easy to plan ahead during your adventure.Cartridge boils 0.5 Litres in 1 minuteOperates in temperatures as low as -30°C Boils 16 Litres of water - equivalent to 53 hot drinks (300ml)Quantity: 100gNote: Please exercise caution when using gas appliances. Do not use inside enclosed areas or tents. Do not expose to temperatures exceeding 50°C. Protect from direct sunlight. Surfaces and appliances can become extremely hot. Do not refill.