Our Neon Glow 12 oz. Cups look great day or night. This 4-pack of glow cups comes in 4 different colors of neon pink, orange, green and blue, complete with glow sticks that fit in the middle of the cup to give them a great-looking glowing effect in the dark. These UV reactive plastic cups look amazing under black lights, too! Simply crack and shake the glow stick to activate and insert up the middle of the glass. While the glow will last for about 4 hours the cup is easily re-useable and can be hand washed and will still glow under black lights. Each pack of 4 comes in a great-looking retail pack. Please order in increments of 1 pack.