Chic Mic’s Bonjour Travel Cup is a truly eco-friendly cup made from renewable bamboo fiber. The binder is corn starch with melamine. The cups 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. Inside each cup is a silicone sleeve to protect your hands from heat and cold, too. It also makes it so your cup doesn’t slip out of your hands ever. The sleeve also comes off if you need to wash it or don’t want to use it. The entire cup and lid is dishwasher safe, but is not recommended for microwaving. Each holds 400 mL or 13.5 oz.