TOP TIP: Flower Pot Drain Hole Cover: Just lay a coffee filter in the bottom of the pot covering the hole before filling the pot. The soil will stay in the pot and the water will still drain out because that is what coffee filters are designed to do; let water through. They last for a long time, too; by the time they fall apart, the potting soil is well packed and the plant has roots that hold the soil together.
Paint pots in whimsical colors and def only use in shaded are w shade loving plants if u live in a hot area! Those pots dry out super fast (even when painted) and the water would just spill out of the top. Could seal the inside w paint and spray sealer. Use water gel mixed w soil to hold in moisture.
Disney world does this! Lowes sells the 4 to 6" round PVC pipe with holes already drilled. Purchase an end cap, fill with rock, soil, and plant. I will often put these in the center of a very large pot to stabilize, and add amazing height and color to a container that has trailing plants (no end cap or rock needed if you are placing in a container)