暖脚器

例句：

1. 1. I put my feet in the warm water bag to relax after a long day at work.
   我把我脚放在热水袋里，工作了一整天后放松一下。
2. 2. The elderly lady uses a heating pad to keep her feet warm during winter.
   那位老太太冬天使用加热垫来保持她的脚温暖。
3. 3. My friend brought a hot water bottle for me to help with my sore muscles.
   我的朋友给我带了热水袋，帮助缓解我的肌肉疼痛。