What's One Product the World Still Needs?

If you could invent ONE physical product that would genuinely make everyday life easier, what would it be?

I'm not looking for app ideas, AI tools, or software.

I'm curious about real, physical products that solve small but frustrating everyday problems.

Think about something you use every day that makes you think:

"Why is this still designed this way?"

or

"There has to be a better solution."

It could be for your home, kitchen, office, car, travel, pets, cleaning, gardening, or anything else.

The simpler the problem, the better.

Sometimes the biggest innovations come from solving the smallest frustrations.

What's one product you wish existed?

How would it work?

What problem would it solve?

I'd love to hear your ideas and experiences.