Wrap the universal adapter using bubble wrap and tape. The prongs on an adapter may bend during your travels, which could result in you having to purchase another one when you get to your destination. If your adapter has a chord, coil it around itself and use a piece of tape to hold it in place. Wrap the adapter two or three times with bubble tape, until all portions are covered. Seal with a piece of clear packing tape to ensure a strong hold.
Place the adapter in a safe compartment of your luggage, such as a zippered pocket full of socks. This will provide extra safety for your adapter as it travels in the cargo hold with your luggage.
Check your baggage at the airport when you check in for your flight. Claim your adapter's value if you purchased insurance for your belongings. This will protect you in the event that your luggage is lost and you must purchase a new universal adapter.