I've seen this in some bakeries, for cakes with lots of wipped cream or soft frosting, they usually bind the cake with this plastic strip, what is that called, where can i get that?
It is usually a chocolate wrap..When you get home you remove the plastic acetate.
Yes it's called acetate and it's often used to line cake rings for molded mousse cakes, frozen dessert cakes, and the like (makes them easier to remove from the ring). You can order them in pre-cut strips, or you can buy large sheets and cut them to size of your molds/rings are odd sizes. I would think most cake/bakery supplies would carry acetate.