Smart Kup Car Cup Holder – Fits Hydro Flask and similar (32/40 oz), Nalgene (32oz) and other containers up to 3.9 inches wide.
Smart Kup is a car cup holder designed to fit the 32/40 oz. Hydro Flask, 40 oz. 50/50 Flask, 32 oz. wide mouth Nalgene bottle 32 oz Gatorades along with soft drink cups and water bottles up to 3.9 inches in diameter.