There's nothing like a swig from a secret stash of social lube to keep things running smoothly day and night. The Beerbelly by Cooler Fun ($35-$50) holds up to 80 ounces of your favorite cold beverage in a gut-shape bladder that can be cleverly concealed underneath your shirt. The bladder is held in an insulated neoprene sling with a one-size-fits-all waistband to comfortably secure your grog.