I've seen a lot of gimmicky diapers in both ABDL art and ABDL stories. Here are some I'd like to see someday.

1. Diapers that swell up to ridiculous sizes. These can hold absurdly large messes. In a lot of ABDL art, they can grow up to the size of beanbag chairs. I doubt we'll ever have diapers that can literally get that big, but it'd be fun to have some that can hold really big messes.
2. Diapers so thick that you're forced to crawl. These are similar to the first one, but they're super thick from the beginning as opposed to swelling up to huge sizes when you make huge messes in them.
3. Vibrating diapers. I'm a huge fan of using a vibrator over a wet and/or messy diaper. These would function like that, but the diapers themselves would vibrate. They'd probably be remote controlled.
4. "Smart" diapers. Probably the most realistic out of all these. They can be hooked up to an app that tells you exactly how much of your diaper's capacity you've used and how soon you need changed.
5. Locking diapers. Once put on, they can be locked and unlocked via an app. It'd be fun for a CG and little to use these together.

What do you all think of these? Do you like them? Do you think they could ever exist in reality? And what are some gimmicky diapers you can think of?