Magic, far as I can tell you! [ But there is a little more he can give than that, and his hands falling on his sides only just in frame, he'll share- ]

It's not any spell you need to know or anything like that. You just have to think 'bout wanting something to be put away, [ which Tidus indicates by squeezing his eyes closed for a second, ] and then when you want it, you remember the item.

[ Simple, right? He tips his head slightly. ] Best to keep a list in case you forget what you got though. There's no 'rummaging' around to remember what's in them.