I got tired of washing out used Ziploc baggies (and very tired of buying and throwing them away) so I decided to make four of my own. Food-grade plastic, cut without measuring, folded in a fluster, and sewn on each side. Added: sticky velcro tabs leftover from Miles's family quiet book. Easily washed and toted around.
Since buying the supplies, I read something about how there's no good plastic, but reusable must at least be better than single use. Right? Well. My next baggies will be fabric, I promise.