Justice League Birthday Party Supplies & Decorations. With same day order processing it's easy to plan an out of this world party! Batman, Superman, The Flash, Cyborg and Green Lantern are all here to help you fight evil and that will make throwing a super party super easy! Solid color partyware in True Blue, Emerald Green and Classic Red add Pops of bold color. You will find a large assortment of Justice League party supplies, favors and decorations all at our usual discounted prices.