If you are anything like me you go through a lot of plastic bags. I try to save all of mine and recycle them but then you have a drawer or cupboard full of plastic bags which is kind of a pain.. I found these enVbags that I just love and now I rarely have to use plastic. They were at a little store called Domus on 44th street between 9th and 10th ave. This store is amazing. The owners travel to different countries every year and buy the local goods and bring them back to NYC. Part of their mission as a store is to improve the living conditions of depressed populations around the world by selling the commercially viable items they produce. If you are ever in midtown it's a great place to spend some time.
The thing I like most about these bags is that I can roll them up into a little pouch and carry them in my purse. I have all of these bags from Trader Joe's (yeah!) and Whole Foods (boo!) but they are big and I never remember to bring them with me. So check them out, or go to Domus where you're sure to find other great items that are good for the planet.