Chic Mic’s Enjoy Balloons Travel Cup is a truly eco-friendly cup. They make the cup and lid from renewable bamboo fiber. Chic Mic also uses corn starch with melamine as a binder. The cups and lids are odor-free and taste-neutral – We’ve tried! The lid locks securely, while the tiny vent hole under the flip lid allows air in while drinking. The silicone sleeve in the cup protects your hands from excess heat or chilling. The entire cup is dishwasher safe, but it is not recommended for the microwave. Each cup holds 400 mL or 13.5 oz.