What does this set of cups have to do with keeping the planet safe? For one, it's made of PLA, a plant-based and environmentally friendly bioplastic that is free of nasties and toxic materials. This innovation, though, does not mean cutting back on what you like about our products, as the cups are resistant to shattering and maintain a long life span. So, the more you use them and reuse them, the more you help the planet. WHAT IS PLA - Most commonly known as bioplastic, it is a biodegradable and compostable material created from the fermentation of corn-starch, sugarcane or sugar beets. , , It is made free of melamine, BPA, Lead, Phthalates, PVC, Mercury, and Latex, making it a great sustainable alternative to petroleum-based products.