Bamboo push-action pen with cornstarch trim. Trim made with 60% biodegradable materials. Bamboo is a natural fiber, therefore noticeable shade variations and grain patterns may be apparent within orders of the same item. Due to our high standards of quality control, we must advise that slight irregularities in the bamboo of this item may result in imprint imperfections but are consistant with the natural look of the product. Complies with CPSIA.