Idea:
When gifting something that has many different variations, for example costumes and hats. First choose to who you wanna gift it, and then show available options.
More information:
It’s frustrating to first pick a costume, then a friend, only to be told they already own it. Make it so you choose the friend first, and then see only the items they do not have.
Yes, I could ask them which item they want, but even then I’d still have to scroll through hundreds of items that they already own…