One of the mysteries of the English language finally explained.
Liquefied petroleum gas, especially butane or propane, stored in containers and used for heating, cooking, lighting, etc. (chiefly as a substitute for mains gas, or as portable fuel when camping); bottled gas.
Of a device or appliance: that burns or uses bottle gas.
Early 20th century; earliest use found in Petroleum Gazette. From bottle + gas.
bottle gas/ˈbɒtl ɡas/
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