Can the e-cigarette oil be shipped?

The e-liquid in e-cigarettes cannot be checked in in most cases, but it is usually allowed to be carried in your carry on luggage. This is mainly because e-liquid contains flammable components and other safety hazards. Under international aviation regulations, under normal circumstances, e-liquid must be placed in sealed containers with a capacity of no more than 100 milliliters and packaged separately in transparent plastic bags.

Basic knowledge of e-cigarettes and e-liquid
What is an electronic cigarette?
An electronic cigarette is an electronic device used to simulate the experience of traditional cigarette smoking. It generates steam by heating liquids containing nicotine, flavoring agents, and other chemicals (commonly referred to as "smoky oil" or "liquid"), and users then inhale these vapors to satisfy their nicotine addiction. The main components of an e-cigarette include a battery, a heating element (usually a metal wire ring), and a container containing e-liquid.
The composition of electronic cigarette oil
The e-liquid in e-cigarettes is mainly composed of several components: nicotine, propylene glycol (PG), vegetable glycerol (VG), and food grade flavoring agents. Nicotine is the main addictive substance in tobacco oil, while propylene glycol and plant glycerol are the basic liquids used to produce steam. Food grade flavoring agents are responsible for providing various flavors, such as mint, fruit, or candy.
The difference between electronic cigarettes and traditional cigarettes
The main difference between electronic cigarettes and traditional cigarettes is the combustion process. Traditional cigarettes need to be lit to produce smoke, which produces many harmful substances such as tar and carbon monoxide. Electronic cigarettes, on the other hand, generate steam by heating the e-liquid without a combustion process, so they do not produce tar or carbon monoxide. However, the e-liquid in e-cigarettes still contains nicotine and other potentially harmful chemicals.
International regulations for consigning electronic cigarette and e-liquid
Regulations of the International Air Transport Association (IATA)
The International Air Transport Association (IATA) has a set of regulations for the shipment of electronic cigarettes and e-liquids. These regulations typically require passengers not to carry electronic cigarettes or e-liquid in checked baggage. Most airlines require passengers to put e-cigarettes and e-liquid in their carry on luggage and meet certain packaging standards to avoid leaks and other safety hazards. Normally, the capacity of e-liquid cannot exceed 100 milliliters and needs to be packaged separately in transparent plastic bags.
Shipping regulations of the European Union, the United States, and other countries
The shipping regulations for e-cigarettes and e-liquid vary in different countries and regions.
EU: Within the EU, e-cigarettes and e-liquid are usually not allowed to be carried as checked baggage, but can be carried in carry on luggage. The EU has a clear set of regulations that typically require that the amount of e-liquid cannot exceed 100 milliliters and must be packaged in sealed plastic bags.
United States: The Transportation Safety Administration (TSA) allows e-cigarettes and e-liquid to be carried in carry on luggage, but there are also capacity and packaging restrictions. Electronic cigarettes and e-liquid are usually not allowed in checked baggage.
Other countries: The regulations in other countries and regions are different, some are more relaxed, while others are stricter. Therefore, it is best to have a detailed understanding of the specific regulations of the destination and destination before traveling.