This tumbler is a bio-composite of 70% bamboo fibers and other natural materials. Bamboo is a fast-growing plant that thrives without fertilizer or pesticides, making it the perfect resource to harvest again and again. Screw on lid with closure that secures when in travel and pins back when in use. Textured silicone grip for comfortable carrying. Fits in most car cup holders for easy on-the-go use. BPA free. PVC free. Phthalate free. Do not microwave. Dishwasher safe (top rack only), hand wash recommended. One-piece natural gift box included (3.75L 7.25H 3.75W). 20 oz. capacity. This product contains bamboo fiber, which is a natural material. Color and pattern variances are to be expected.