Reta on a plane?

The pre-filled travel vial approach is cleaner for short trips - pre-draw your doses into a dedicated vial and keep the main stock at home rather than traveling with all of it. For 2-3 days, the main logistical question is keeping it at the right temperature in your carry-on.

The reconstitution volume strategy of 2mL up to 40mg and 1mL for 50-60mg is a practical approach for managing concentration and pin count across different kit sizes. The travel vial approach for air trips is sensible - having a smaller pre-measured vial reduces handling and temperature exposure compared to the main kit.

Making a travel vial from the main supply so the original isn't temperature-cycled is exactly the right call. Keeping it room temp for the short vial life rather than worrying about fridge access on the trip removes a logistics headache. TSA usually doesn't flag small vials when they're clearly medical supplies.