EcoChoice 24 oz. PLA compostable plastic cold cup. If you're looking for a compostable plastic cup for your beverage serving needs, this PLA plastic cold cup is the perfect solution! This 24 oz. disposable cup is made of "green" and environmentally friendly PLA resin derived entirely from recycled materials. Plus, it promises a tight, secure fit with a compatible lid (sold separately), perfect for to-go applications.