Definition
A thermos bottle, also known as a vacuum flask, is a container designed to keep liquids either hot or cold for extended periods. It works by using a double-walled construction with a vacuum in between, which minimizes heat transfer via conduction, convection, or radiation. Think of it like a high-tech, super-insulated water bottle. It's a must-have for hikes, camping, or even just keeping your coffee warm during a long day at school. Unlike a regular bottle, the thermos ensures your drink stays at the temperature you want it to be. It’s basically a personal climate control system for your beverages! 🧊🔥