Mary made her very own zafu for doing yoga at home. I must admit, it's very well made - it looks just like something you'd get from any of the yoga supply shops. It's a round pillow, stuffed with buckwheat hulls. And why buy something for $49 when you can buy the materials for about $5 and sew it yourself.
I'd been wanting to try a buckwheat pillow for a while, but never wanted to actually buy one. They seem like they might be loud - the hulls rub together every time the pillow shifts, sounding kind of like a rain stick. Plus, I'm a cheapskate.
Well, I finally put two and two together and started using Mary's zafu. With a regular pillow (even the extra firm ones), I usually couldn't sleep on my side for very long, and often ended up on my back (which exacerbates my snoring). With the zafu, I stay on my side all night. I flip sides once or twice to help my arms which tend to fall asleep after a few hours of me lying on one shoulder.
All hail the zafu.