Abstract: A liquid storage container for a painting device includes a container for storing paint. The container is connected with a lid by screw fastening. The top of the lid has a connecting part with a hole. A flow guide element extends from below the hole. The glow guide element has a channel in fluid communications with the hole. The other end of the channel has a first glow guide in fluid communication with the inside of the container. A steel ball is disposed in the upper portion of the channel with one side urging against the surrounding of the hole. The other side of the steel ball is urged by a spring. The other end of the spring urges against the bottom of the channel.