For the past ten years, I’ve accepted periods as a part of my life. I kept track of it in my calendar and was happy to pop a pad in without a second thought, cooling the cramps when they came. But things began to change when I began dating my partner, who is passionate about the environment and has gotten me hooked on everything from composting to sustainable products. I decided to buy a period cup, for its one-time cost and ability to be washed and reused every month…