I am not a waitress but I order a lot of delivery food. If it is under $30, I tip $10. My grandson who used to work at a pizza place, says I have made friends for life. If I can order delivery food, I can also afford a good tip. Most are young people and they deserve being treated nicely. I do not understand this no tipping nonsense.
My step-daughter worked as a waitress in pizza places and restaurants for a number of years. She said the worst tippers were old people. The best tippers were single men. Or men in groups without their wives.