Are copic markers allowed on airplanes!?

Yes, Copic markers are generally allowed on airplanes, but there are some restrictions. Since they contain alcohol-based ink, they may be subject to regulations regarding flammable materials. It's best to pack them in your checked luggage to avoid potential issues at security checkpoints, but you can also carry a small number in your carry-on. Always check with the airline and relevant authorities for specific guidelines before traveling.