
Based on the context provided, which points to the common availability of 50ml -bottles and travel-related queries about them, the question likely concerns the regulations for bringing these items on an airplane.
Generally, 50ml bottles, often referred to as "airplane bottles," are permitted in your carry-on luggage. These bottles fall well within the Transportation Security Administration's (TSA) liquids rule, commonly known as the 3-1-1 rule. This policy states that all liquids, aerosols, gels, creams, and pastes must be in containers of 3.4 ounces (100 milliliters) or less. A 50ml bottle is significantly smaller than this maximum limit.
All of your small liquid containers, including any 50ml bottles, must fit comfortably into a single, clear, quart-sized, resealable bag. Each passenger is allowed only one of these bags in their carry-on. While the TSA permits you to transport these items through security and onto the aircraft, it is important to be aware of individual airline policies. Federal regulations prohibit passengers from consuming alcohol on an aircraft unless it is served by a flight attendant. Therefore, you may bring your 50ml bottles with you, but you cannot drink them during the flight.


