On Ryanair in 2026, you can carry vapes and e-cigarettes, but they must be in your carry-on luggage or on your person. They are strictly prohibited from checked-in "hold" luggage due to the fire risk associated with lithium batteries. While there isn't a strict "quantity" limit for the devices themselves, you are limited by the total battery capacity; each battery must not exceed 100Wh. For most travelers, this means you can easily carry 2–3 personal devices without issue. However, you must also consider the liquid limits for your e-liquids. All vape juices must fit within your single, transparent, quart-sized (1-liter) bag for security, with each individual bottle not exceeding 100ml. In 2026, Ryanair remains extremely strict about the use of vapes on board: using or charging an e-cigarette during the flight is a serious offense that can lead to heavy fines or being banned from the airline, as it can trigger sensitive smoke detection systems.