Insulation cup has many kinds, edible alkali bubble, will also fall, ||| won. Carbonate carbon dioxide is refers to the class. Vinegar is not ||| carbonate with vinegar brush to clean no problem. Turn insulation cup to pour the scale removal. The cup is not scaling. The baby powdered formula to drink tap water burn boiling water. The boiling water to cook for a further 3 to 5 minutes. When the temperature in 50--60 degrees. If the scale. Must take the scale removal. For boiling water in the scale of. Easy removal of boiling water in the scale, rust and other sediments and suspended solids. Yongkang water special Pioneer Metals Corporation