With festive outfit patterns vanishing after the end of the event, what will happen after an outfit being "washed off" with the gray jar?

Will it appear back in the inventory, or will it vanish altogether only to be crafted again, which can only be done as long as the event lasts?

Outfits work just like Rainbow Jar. They are bound on use and can't be transferred from one pet to another. Gray Jar doesn't refund customization items, it only reverts pet appearance back to default.

Thank you for your clarification, it is solved.