Chic Mic’s Enjoy Balloons Travel Cup is a truly eco-friendly cup made from renewable bamboo fiber, corn starch with melamine as a binder. They are odor-free and taste-neutral – We’ve tried! The lid locks securely, while the tiny vent hold under the flip lid allows air in while drinking. There is a silicone sleeve in the cup to protect your hands, too. The entire cup is dishwasher safe, but is not recommended for microwaving. Each holds 400 mL or 13.5 oz.