It's unwise to drink tea on Lufthansa and a poor idea to swill coffee on British Airways. On British Midland though, BA's sister company(?), the airline apparently uses Kopi Luwak coffee which is a little more pungent and considerably more expensive than the normal black manure pit run off served on the UK national flag flapper.
Comair in South Africa, which is reputedly a BA sub servant airline is believed by some to produce in flight coffee by boiling the buttons cut from the uniforms of the dead of the 24th Regiment of Foot, (2nd Warwickshire Regiment ) after the great battle of 22 January, 1879.