I recently bought and potted these plants in these adorable glass mushroom mugs (bc they are too fragile for actual coffee drinking imo). Plus the chives in the terracotta; also no drainage). They have no drainage, but I read that to "imitate" drainage I could put rocks at the bottom under dirt. Do you think this would be beneficial? Or do you have anything else I should add as well? Or other suggestions! I just really love these mugs and want to use them. Plants: String of Pearls (has some rocks mixed with soil), Lucky Bamboo, Spider Plant, and Purple Waffle Plant