In one sentence, describe what the following article is about:

A glass nail polish bottle is an ideal container for the oil because the attached brush allows for easier application. To clean out an old nail polish container, fill it with nail polish remover and allow it to sit for 30 minutes to an hour to dissolve any polish at the bottom.  After the polish bottle is clean, dump out the nail polish remover into another container for disposal and bring it to your local hazardous waste facility to get rid of it. You can also use a small glass bottle with a medicine dropper or roller ball to hold the oil.

Summary:
Clean out a nail polish bottle.