Using an upside-down water bottle isn’t the only way to keep your plants well-watered while you’re traveling. You can also use the water-wicking method, courtesy of none other than Martha Stewart!
Cut a piece of cloth long enough to connect a container of water to your plant. The gravity will do the rest of the work for you—cloth will slowly wick water from the container into the pot, keeping the soil wet while you’re not around. If your pots are on the larger side, use several “wicks” to get the job done.