Intro: Solder Holder
this is simple a easy DIY project all you need are 2 pcs 3mm thick for the side and one 10 mm by any size you like
cut the two side panels so they look the same. then drill a hole so you could place a dowel across the two holes.
glued the two sides to the base. let it dry paint it if you like and then place the roll of solder in the dowel and presto
your solder is there. no more looking for it..