reusable

Something is reusable if we can use it over and over again without throwing it away.

You might hear people talking about reusable bags, which are cloth or sturdy plastic bags that we can use many times to carry groceries. We fill them up with our purchases and then put them back in the car to use again next time we go shopping. Reusable coffee cups are another example - they're made of a special material that keeps drinks hot for hours, so we don't have to toss out disposable paper cups all day. Some people even talk about reusable straws, which can be cleaned and used multiple times instead of getting thrown away like plastic ones.