Designed for “the new man in your life”, the Mustachifier comes in three desirable shapes:  The Gentleman, The Cowboy, and The Ladies Man (which reminds me of “Larry” from Three’s Company).  I don’t see why this couldn’t be used with adults, too?

The Mustachifier by FCTRY
$9.99 individual | $29.99 set of 3
shop.fctry.com