I use a .177 pellet tin with a piece of fibreglass rope in it (the sort of stuff used as a seal on log burner stove doors). You need enough to fit snugly all round the inside rim of the tin and a little bit across the middle. Then add the meths.
Fits in the Crusader well a treat! Boil time about 8 mins or so.
Fits in the Crusader well a treat! Boil time about 8 mins or so.