I was on a beach vacation recently, and I went into this one store near the beach which sold these very cute tote bags made of nylon (I think). The material is very thin, but the prints are very cute and the bag can be rolled into a very small package. I was debating on whether I should get one, but I decided to pass. Now I can't get the bag out of my mind and I don't even remember what it's called! Eco bag? Eco sac? I don't remember! Can anyone help?