1000W-110V Immersion Water Heater-10in Electric Water Heater, Portable Submersible Immersion Element, Calentador de Agua Electrico Boiler Element Heating Coil for Heating Waters in Jug,Flask or Bucket

I’m not positive, but pretty sure you drop the metal end in water and plug it in for hot water Edit: like this. https://www.amazon.com/Rugam-Heater-Portable-110V-Travel-Element-Calentador-Inflatable/dp/B0CHDKV6ZG