Me me dropper vials feem ntau yog siv rau khaws cia thiab xa cov tshuaj ua kua lossis tshuaj pleev ib ce. Cov vials no feem ntau yog ua los ntawm iav los yog yas thiab nruab nrog cov droppers uas yooj yim los tswj cov kua dej. Lawv feem ntau siv rau hauv thaj chaw xws li tshuaj, tshuaj pleev ib ce, thiab chaw kuaj mob.