Clean, remove caps/rings/lids and discard, flatten.#1 containers (clear/green soda bottles, salad dressings)#2 containers (narrow-mouth bottles: i.e. milk jugs, orange juice, detergents, shampoos; wide-mouth containers: i.e. whip cream, margarine, some cottage cheese, etc.)NO motor oil bottles, solvent or pesticide bottles, styrofoam, plastic cups, plastic bags and film, hard plastic (toys, pails, etc.), syringes, nor any #3 through #7 plastics.