What do you do with plastic spice bottles when you've transferred the spice to a rack

Question

I'm referring to those racks that come with their own perfect-sized glass jars. If you have one of those, what do you do with the original plastic bottles that are left over?

Answer 1

wash them out, unscrew the cap and recycle them :)  

Answer 2

Use 'em to hold tiny screws, electronic components, and keep medicinal herbs nice and fresh...