保温杯（Vacuum cup）一般是由陶瓷或不锈钢加上真空层做成的盛水的容器，顶部有盖，密封严实，真空绝热层能使装在内部的水等液体延缓散热，以达到保温的目的。 保温杯从保温瓶发展而来的，保温原理与保温瓶一样，只是人们为了方便把瓶做成杯。
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