保质期 (bǎo zhì qī): shelf life, expiration date

When buying milk, I always check the shelf life first to avoid buying products that are about to expire.

This medicine has passed its shelf life and can no longer be taken; it must be thrown away immediately.

Bread in the supermarket usually has a shelf life of only a few days, so it's best to buy only as much as you can eat.

Food packaging clearly indicates the production date and shelf life, so consumers can judge whether it is safe based on this information.

Even in the refrigerator, fresh meat cannot be stored indefinitely; its shelf life generally does not exceed three days.