The bigger the pot the more roots you will have so you get more fruit. Smart pots are good if you cut out the bottom to let the plant drain and grow roots into the soil plus in wind they stand up better. When you water a pot take the nozzle and water around the inside edge of the pot to get the sides moist do this every day or so even if you don't water the plant. Once the plant has filled the pot with roots and you have a lot of foliage it will probably need water everyday use a moisture meter to check.