If there are no holes, the heat will not be able to shed, water will continue to overflow from outward, like a pressure cooker, if not, then the gap will continue to beeps.

• 如果没有孔的话，热气就无法散出，水就会不断地由壶内向外溢出，就像压力锅一样，如果没有空隙的话会不断发出哔哔声。