Patented exclusively for Glowsource, our Cool Glow Cups are the ideal, inexpensive solution to your glow in the dark party cup needs. Whether your planning a house party or a prom..., Your party isn't complete without our Cool Glow Cups! Pack includes 50 Patented Cool Glow Cup Collars, 50 plastic disposable cups, and 100 Super Bright Shorty glow sticks: place an activated glow stick (or two) in the collar (do NOT use included connectors), then attach collar to cup for instant glow.