Crazy Glow Cup Assortment. Glow swirls and twirls around these tumblers for a delightfully dizzying effect! Serve party drinks in these glasses at your next St. Patrick's Day or Mardi Gras party to add a blast of color to your event. Great for keeping the drinks flowing and the fun going even after the sun goes down. Choose these glow cups for a wedding reception, graduation party or birthday fun, too! 13.7cm 12 oz. Assortment may vary. Expose items to daylight to activate glow.