An old boyfriend used to swear by those aluminium cigar tubes, but he did have a very unique style.

Take cigar tube. Snip end off. Snip up the centre of tube, opening out slightly. Make sure tube (now curved sheet) fits over fingers. File down the edges with .22 grit glasspaper or sapphire steel nailfile.

I remember it gave a more mellow, less twangy sound but still sounds great.

LTS