The Gaaia menstrual cup is a reusable cup made of soft silicone that is worn internally like a tampon, but collects—rather than absorbs—your menstrual flow. Naturally odorless and chemical free, the Gaaia cup is a healthy and sustainable alternative to pads and tampons. Because it has 3 to 4 times the capacity of a regular tampon, you can wear it for up to 12 hours before emptying. Yes, that means you only have to change it twice a day, and can sleep with it in. Once inserted, the cup's flexible design molds to your internal shape so you can comfortably wear it to hike, swim, or just relax.