You can have a lifetime supply of anything you want

You are given a one time choice to have a lifetime supply of anything you choose but there a few exemptions. You cannot choose money or anything having to do with finances whatsoever. You cannot choose people or animals. The item must be a physical item already in existence (no unlimited love or world peace, etc). You canot choose food or drink of any kind. If you choose something such as 'unlimited cars' or something that typically isn't replaced often and are typically bought 1 at a time, if anything negative ever happens to it or it breaks or if you lose it, a new one in perfect condition appears in its place. (TV broke? A brand new one shows up in its place). If it's something that is replenishable, every time you run out, your supply is immediately refilled (let's use a box of nails as an example: when you've used the last one, a new standard size box appears). The wish can only be for your own use. You can't wish for unlimited anything for anyone else (No unlimited houses, cars, etc for the world) When you receive the item you wish for, it is only delivered 1 at a time in its standard packaging and replaced, for life, as needed. What would you choose and why?