I just got made aware of some fake OctoPrint merch being linked to in an (unofficial) OctoPrint Facebook group. The only official merch that actually supports OctoPrint is listed on merch.octoprint.org. Anything you find elsewhere is NOT and should be reported as such.
And while we are at it, there are no official Facebook groups either and there never will be. If you are looking for the official OctoPrint community you can find that on community.octoprint.org (forum) and on discord.octoprint.org (Discord server).