I like yogurt very much, so I like yogurt machine very much. The inner container is a glass with a capacity of about 300 ml. Every day, I just pour a box of milk into it and add a pack of bacteria powder. If it is sour, I will add sugar. After fermentation, acid will neutralize a lot of sweetness. Plug in the power at night and it will be fine in the morning. Wash the cup after drinking. Super practical!