The 2-Cup Holder – Vertical Mount is perfect for a couple of cans, bottles, or wine glasses (with the stem insert ). It mounts easily to the side of a bait tank, the side of your vehicle while tailgating or camping, or even the outside of your boat at the sandbar. Have a YETI Tumbler or similar oversized drink? Pick up a couple of Tumbler Rings — they snap onto your cup inserts for a snug, rattle-free fit.