@doudougoodthing: Finally found this kind of cup brush that can brush all kinds of cups. "Cup brush stainless steel wire, no matter how deep the kettle and cup can be brushed easily without leaving a dead angle, it can also be used as a pot brush and hung up without breeding bacteria." Steel wire cup brush #brush #LongHandlePotBrush #DoudouGoodThing #KitchenGoodGoodsRecommendation #GoodThingRecommendation #fpy