This is one we've found to be super useful on cruises: Anker Power Strip with USB, 5 ft Extension Cord, PowerPort Cube USB with 3 Outlets and 3 USB Ports, Portable Design, Overload Protection for iPhone XS/XR, Compact for Travel, Cruise Ship, and Office https://www.amazon.com/dp/B07D25RSWX/ref=cm_sw_r_apan_glt_fabc_A6SAEHSWJ5ESMZ1RC1WA?_encoding=UTF8&psc=1