Interesting idea for spices. Use magnetic containers from Bed Bath & Beyond. I wonder if you could paint the lids with chalkboard paint for easy labeling? This sure would solve the problem of running out of space to store all of those pesky bottles!
This is a website with every kind of container you could want... These would be great for spice containers and they are just .75 cents each... I think I will get a big nice cookie sheet and decorate it... the add magnets to the bottom of these containers and make my own spice rack.