You never know when you may need one of these--amirite, ladies? (Photo: TBD staff)

At some point during the Rally to Restore Sanity and/or Fear, you may find yourself in need of a tampon. Usually this isn’t a huge deal, unless you’re stuck on the Mall, which doesn’t have a single bodega or drugstore nearby. It’s just museums and street vendors hawking T-shirts and hot dogs — sadly, there’s no dedicated Kotex peddler. As with using bathrooms, the museums ringing the Mall are the best place to score period products. A quick guide to which museums have working tampon machines:

National Museum of the American Indian: Tampons 50 cents, machines in good working order during a recent visit.

National Air and Space Museum: No tampon machines spotted.

Hirshhorn Museum: Tampons 25 cents, no luck getting machine to work on a recent visit.

National Gallery, West: Tampons and pads, 50 cents, machines in good working order on a recent visit.

National Gallery, East: No tampon machines spotted.