Ridged bottom with textured surface. Plastic. Won't stain or absorb odors. Choice of Colors: Blue, Blush, Black, Brown, Cranberry, Desert Tan, Navy Blue, Orange, Pearl Grey, Red, Sherwood Green or Teal. NSF. Ships from IA, CA. CALIFORNIA PROP 65 WARNING: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. For further information, visit their website.