Perma Event Cosmetic Item

[FORGIVE ME IF SOMEONE ALREADY SUGGESTED THIS]

I had an idea for an item that would make any [1] Event cosmetic permanent. You could buy this item from the donor shop and apply it to any event wearable of your choosing! Like how any cosmetic purchased with Donor Cash becomes permanent it does the same thing but in this case you buy this item and then you double click it and put the event item you want inside and press ok and a glittering animation happens and then it becomes permanent (Kind of like legendary spirit skill, it could use the same UI)! What do you think?

This item could be called [Jar of Preservation]