双层杯用英语怎么说

双层杯在英语中通常称为 "double-walled cup" 或 "insulated cup"。这种杯子通常是由两层玻璃或不锈钢制成，中间有一个真空隔层，用来保持饮料的温度。双层杯最初是由法国人发明的，目的是解决热饮料容易烫手的问题。

一些英文例句和其中文翻译如下：

I always carry a double-walled cup with me when I travel. It helps keep my coffee hot for hours. (我旅行时总是带一个双层杯。它能帮我的咖啡保温几个小时。)

I like to use insulated cups when I'm outside in the cold. It helps keep my hot cocoa warm. (我喜欢在冷天外面用保温杯。它能帮我的热可可保温。)

My sister bought me an insulated cup as a gift. It's great for keeping my iced tea cold on hot days. (我妹妹给我买了一个保温杯作为礼物。在热天里它能帮我的冰茶保持冰凉。)