Your guests have a back up with the personalized charging cables. After testing several cables, these are the best because they are braided instead of made with cheap plastic.
Charging cables are compatible With Apple® 8-Pin, Micro USB And Type-C Devices. Just plug the cable into a powered USB port and then into your device or smartphone. Cable colors are black or silver.
Cables measure ¾" W x 6 ¼" H with an imprint area of ½" W x ¾" H.