This set of drinking straws is reusable, biodegradable, sustainable, durable, BPA-free and Vegan. Made from 100% natural organic bulrush making each straw unique in its own variance of color, texture, thickness and diameter. NO Ink, Dye or Bleach were used. We recommend washing your straws with the included brush before the first and every use. Simply use warm soap and water and let the straws dry naturally. This will ensure that your straws last for many.