travelling cooler

例句：

1. 1.We need a travelling cooler to keep our food cold during the trip.
   我们需要一个旅行用的冷却器，在旅途中保持食物冷藏。
2. 2.The cooler is designed to keep drinks cold for hours.
   这个冷却器设计用来让饮料保持几个小时的低温。
3. 3. He brought his cooler with him on the camping trip.
   他在露营旅行时带着他的冷却器。