I use various square flake tins to keep different trappings for my pipes in (extra softee bits, q-tips, wind-caps, etc), while unique round tin lids go on display around my man-cave. Doubles of round tins live in various places around my house, for example, I keep one in the back of my amp, full of picks, capo, slide, etc.
The C&D and McClelland tins I remove the labels from (which the wife then decopages to a breadbox I've converted to a tobacco storage area), cut a slit in the lid, and use for fouled pipe-cleaners in my truck and man-cave.