If possible, place your flower stand in a cool room or shaded area. Avoid direct air-conditioning, direct sunlight, extreme heat, dust, and ripening fruit. All of these conditions may make your flowers wilt faster.
The flower stand is designed with waterproofing inside, and there's floral foam present. You can pour water or inject it through the gaps between the flowers to keep the floral foam moist. Spray or spritz your flowers with clean tap water once a day to give them additional hydration.