Folding cup (0.6L) from Wildo is made of BPA free TPE rubber, which can be used for hot or cold when you are on the go. The folding cup can hold 600 ml, and when you are done, you can fold it to just 4 cm. The folding cup weighs only 46 g, which is why it is easy to carry. Folding cup (0.6L) from Wildo is CO2-friendly, as it is produced from 50% bioplastic based on sugar cane. How is this so CO2-friendly, you think? When bioplastic products are thrown away for incineration, they emit only the same amount of CO2 that the plant used during cultivation. Why is this not 100% CO2 friendly? Because bioplastics can never be 100% due to other factors such as cultivation, transport and production come into play.