These environmentally friendly straws are made from Bamboo, literally handcrafted Bali. The bamboo used to make the straws is 100% organic without chemicals. Bamboo straws can be washed and used over and over again unlike plastic straws. Bamboo is a tough durable material but isn't harsh on teeth like steel straws. They can also be washed in the dishwasher or by hand with an included cleaning brush. Since they are organic bamboo, each straw is unique and the color and diameter can vary between straw.