Does anyone know what kind of bathtubs were used during each of the historical dolls eras?

I finally ordered the bathtub, even though it is backordered, because that is an item I do NOT want to miss. I'm going to do what I've planned all along - I'll paint it white with gold trim. Even though I can't change the style, I can at least change the color.

After the tub is painted, I'm going to make some real bath accessories. Such as cutting a bar of soap so it is doll size and putting shampoo in a tiny bottle and making a little towel and washcloth and ducky. I'm going to put all the bath items in a little basket to keep beside the tub.

It would be great to find out more about vintage bathtubs though. I'd like to fix the tub so Kit or Samantha or Nellie can use it, along with any vintage bathing items. I'm not sure what those would be though. Does anyone have a good source for vintage bath items? With photos?

Julia