With completely wireless earbuds, the rule is: when the battery fails, they have to be disposed of. Not so with the Fairbuds, that allow you to replace batteries in just a few seconds. Combined with a repairable design, the earbuds should therefore have an extremely long lifetime.
All of these honestly ought to just come with a small hole and bring your own ‘lanyard’/‘string’. I can’t imagine it would require much in terms of design to put a hole in a corner.