Large small automatic umbrella. The Brest Sport umbrella opens and closes automatically. The umbrella, made from strong rPET material, features a reflective edging that ensures your visibility in the dark. It takes 2.2 bottles (0.5 liters each) to make one umbrella. Size 21". The material rPET is made from plastic that has already been used once, such as PET bottles. The plastic is sorted, cleaned, and crushed into granules. The granules are processed so that they can be used to create new products, effectively recycling the plastic.