Flip World Add-On
The Flip World Add-On retails for US$9.99 and includes US/AU and EU plug add-ons, compatible with the Flip Duo, Quad, and Power. I bought it to use with my Flip Quad, the prongs rotating to fit various regions.
Flip World
Flip World travel-plug adapters.
Flip Duo World
After the Kickstarter success of the Flip British Plug, OneAdaptr announced the Flip World range in November 2017, spanning four products from the Duo to the Power World. Pre-orders got 30% off with the code WorldIn18.