For miniature painting, dropper bottles with a good no-clog lid are the best. Monumets Hobbies Pro Acryl models paints probably have the best bottles. Pots are better for regular painting, as it is easier to scoop more paint and it also dries fast. For models you need smaller amounts of paint and precision. The bottle are also tightly closed and the air doesn't come in contact with paint like with pots.