The Chillsner is a cool pick for the dad who loves to kick back and invite friends over for the game. Here's how it works: Freeze the stainless steel chillers, and then press the top of the Chillsner into the bottle to create an airtight seal. The truly amazing thing about this icy gizmo? The vent at the mouth of the cooler allows you to sip even while it cools your beverage. Available on Amazon; $18.99.