Our products are made of natural materials, as a result there will be some variations in color and slight differences that make each item unique, more so over time. These characteristics, some seen after use, should not be seen as faults but as part of the evolving patina of the product. To preserve the color of your product please store away from sun when not in use. Use a small amount of water to spot clean as required. Do not use chemical cleaners as this may stain the straw and cause discoloration.