Eh, Real Bubee warmer tu memang ada beberapa cara guna depending on model dia, ada yang pakai botol langsung dalam air panas, ada yang plug in je. Best way is reread the instruction manual sekali lagi tapi kali ni focus on the diagram, sebab sometimes the pictures explain better than words! One of my mum friends pun confuse awal-awal, tapi she called their customer service and they guide her step by step, super helpful. If you still tak paham after that, try searching their YouTube channel or Facebook page, usually ada video demo there!