It sounds like you might be referring to a "temperature bottle"—a container that helps maintain or monitor the temperature of a liquid, often used for drinks or other purposes. These bottles come in a variety of forms, from insulated bottles designed to keep beverages hot or cold for extended periods, to bottles with built-in thermometers for measuring the temperature.

Could you clarify if you mean:

1. Insulated Bottles: These are designed to keep drinks at a specific temperature for hours, such as Hydro Flask or Thermos bottles.
2. Thermometer Bottles: Bottles equipped with temperature sensors or gauges, often used in science experiments or medical applications to monitor temperature.