I picked up the Quick Sip Cap for my 32oz Sport Canteen and it has made drinking water way easier during workouts. The flip top opens with one hand, and the extra-wide mouth fits ice cubes without a struggle. The large handle is handy when my hands are full. It fits my 20oz too, and the description says it works with 40oz and 60oz Canteens as well. Only note: it is final sale, so be sure of your size before buying. Solid addition for hikes and gym sessions.