Smart Kup - Car Cup Holder - For Hydro Flasks 32 oz and 40 oz, Nalgene 32 oz and other large bottles up to 3.8 inches wide. 3 inch upper cup will hold your items unlike the competitors. Designed to hold the 32/40 oz Hydro Flask, 40 oz 50/50 Flask and other larger bottle up to 3.8 inches in diameter for most car cup holders. 3 INCH UPPER CUP WILL HOLD YOUR FLASK WHILE DRIVING AND MAKING TURNS... OTHER CUP HOLDERS ARE ONLY 2" and your bottle will fall out on turns! Incorporates a one inch cut out to also hold mugs and other cups with an external handle. Tapered base that goes from 3.2" to 2.6" to provide a snugger fit most car cup holders. Made from high strength ABS plastic with a glossy charcoal finish.