Can any of you mommy's out there please give me some tips on a toddler biting and spitting out his…

Can any of you mommy's out there please give me some tips on a toddler biting and spitting out his sippy cup. I don't know what else to do. I can't bite him back and that's what everyone says I just don't have it in me. The spitting out his drink from his sippy cup has been an on going battle for almost 5 months I've taken it away and Ive gave him a small tap just enough for him to feel it and nothing works.