How long is the contraceptive sponge good before it expires?

The contraceptive sponge is typically effective for up to 12 hours after insertion, but it can be used for multiple acts of intercourse within that time frame. The sponge itself has a shelf life of about 5 years from the date of manufacture. It's important to check the expiration date on the packaging before use, as using an expired sponge may reduce its effectiveness.