Heating water in an empty plastic container without using a microwave oven, as demonstrated on TV programs or in various videos, is not a safe practice and is not recommended. Doing so can be dangerous for several reasons:
Risk of melting or burning: Plastic containers are generally not designed to withstand high temperatures. When exposed to direct heat, especially an open flame or hot surface, the plastic can melt, release harmful chemicals, or even catch fire.
Release of toxic chemicals: Heating plastic containers can cause them to leach harmful chemicals into the water or food they are holding. This can contaminate the water and make it unsafe for consumption.
Uneven heating: When water is heated in a plastic container on a stovetop or other heating element, the heat distribution may be uneven. This can result in localized hot spots in the container, leading to potential hazards.
Risk of steam burns: Without proper safety features, such as a lid with a vent or an opening for steam to escape, heating water in a plastic container can create excessive steam pressure, leading to burns when opening the container.
If you need to heat water, it is best to use a microwave-safe container or a traditional kettle designed for this purpose. Additionally, you can use a stovetop or an electric kettle, both of which are specifically designed to safely heat water. Always prioritize safety and follow the manufacturer's instructions and guidelines for using any kitchen equipment.