Flexible tank

A flexible tank is like a giant balloon that can hold things like water or other liquids. It's made of strong material that can stretch a lot, kind of like an elastic band.

Just like how your stomach can stretch when you eat a big meal, the flexible tank can stretch when it's filled up with liquid. And when the liquid gets used up or emptied out, the tank can become smaller and take up less space.

Flexible tanks are really useful because they're lightweight and take up less space than traditional hard tank containers. Plus, they can be folded up and stored away when they're not being used.

Overall, flexible tanks are a handy and versatile tool for storing liquids in a way that's practical and efficient.