An atomizer device can include a container for storing liquid for atomization, the container defining a top portion and a bottom portion, the top portion defining a mist opening. An ultrasonic transducer can be located at the bottom portion of the container and configured to generate waves in the liquid. A sleeve can extend from the bottom portion toward the top portion of the container. The sleeve can be configured to direct the waves along a longitudinal axis of the sleeve. A float can be located within the sleeve and be configured to move along the longitudinal axis of the sleeve. The float can define a through hole, wherein the waves are concentrated toward a surface of the liquid by passing through the through hole.