Polarbox Rainbow 20L Cooler Box. The Polarbox Rainbow 20L is the perfect blend of retro-inspired style and practical performance. With its vibrant pastel colours and vintage design, it’s ideal for picnics, beach days, or keeping drinks and food cool on the go.This lightweight cooler features an insulated interior to maintain cold temperatures for hours and a removable colourful leather strap for easy carrying. Compact yet spacious enough to hold essentials, the 20L capacity makes it a must-have for all outdoor events