|Hot glue a magnet to the base of small container with a lid - these are 35ml (1.2 oz)|
|Screw an IKEA strip to the wall, or use a magnetic whiteboard, or a metal sheet, possibly even magnetic paint (but I'm not sure how strong that is).|
|Fill containers will all those little bits and bobs that lie around the sewing room - press studs, hooks & eyes, thimbles.|
15 January 2014: Update
Although great in principle, this idea is simply not working. Originally, I used a hot glue gun to attach my magnets to the bottom of my containers. A number of them fell off. In researching, I've found that the heat of the hot glue can also demagnetise the magnet.
I tried double sided tape, a good strong one, but it doesn't stick to the plastic containers reliably. I'm forever giving containers a 'push' to reattach the tape.
I tried PVC glue - again, it doesn't stick to the plastic.
I'm thinking of ditching the magnet idea and using sticky velcro dots. If the velcro stays stuck to the plastic containers, this would have the added advantage of being able to stick a matching dot anywhere on the walls in the sewing room.
This is a good site for info about sticking magnets to various materials: http://aussiemagnets.com.au/knowledgemanager/questions.php?questionid=17