The venerable penny is still legal money but will become scarce in practice. Looks like merchants will round down cash prices to the nearest .X0 or .X5.

US Mint in Philadelphia presses final pennies as the 1-cent coin gets canceled.

https://apnews.com/article/us-mint-treasury-department-penny-end-production-86139df5644ef0885a9baf98e9677380