Take these for instance. Perfectly serviceable tea tins that I didn't want to just toss out. But the labels are not removable and sadly, they aren't quite pretty enough to stay as they are. (They have nutrition facts on the back. Despite the fact that all the values are zero, because it is TEA.) EDIT: I wasn't clear enough about the nature of the labels - they are actually screen printed on, not just stuck on, so it really is impossible to remove them.
Solution? Carefully tape them off.
Prime them. Paint them with chalkboard paint.
Write the contents on them in chalk and change it up as often as you like. You could do this project with any container, really. Leftover glass jars with a rectangle of chalkboard paint might be my next project. My sister and I were talking this weekend about doing this with larger containers for pantry storage in her new house. It's a bit like Martha's etching idea, but without the hazardous chemicals or the commitment.
Maybe I just like chalkboard paint because I am indecisive.
*This tutorial is provided for personal use only. Please do not sell this tutorial or create items for re-sale using this tutorial. Tutorial may be re-published only with my permission.