sio-chúi-tē燒水袋

hot water bottle

hot water bottle; hot water bag (made of rubber)

English Wiktionary, “燒水袋” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E7%87%92%E6%B0%B4%E8%A2%8B · confidence: Medium (Wiktionary)