Where do you bathe your baby and how often

I still use the baby bathtub put it in the kitchen sink. On the weekends they take a bath in the real bathtub. I would use the real bathtub more but with two babies it's easier if I still bake one at a time and the other can play. On the weekends my husband is here and helps bath them. I don't think they're old enough yet where I can buy them at the same time in the bathtub. They usually get a bath every other day