So you know that fanon [1] thing where vampires can only sleep or rest if they're getting treated like the dead, be it in a coffin or tomb, or simply under a burial shroud?
Consider: Because intentional turning is something positive for vampires, and one that functions more as a rebirth and a welcoming into an inner circle or a community, it's common to make richly decorated coffins or richly embroidered burial shrouds for the new vampire to use in their turning sleep and thereafter when they need to rest.
It's celebratory, and a symbol of belonging and investment in the new fledgling. Something like a bridal gift, something like a baby blanket.
Louis embroiders Owen's with little vignettes of important points in their relationship.
I'm guessing derived either from Dracula's condition of needing his grave's soil in his coffin, or the folklore that inspired that
