One of the most popular styles among parents is to use bathtubs that include a changing table--"2 in 1" models. These options are very helful in saving space. The best thing about them is that they usually sit at a certain height, so the parent's back will not suffer when bathing the baby.
Depending on the model, some even have drawers and/or trays, so that they become a piece of furniture in the room. Simply remove the changing table tray to find the bathtub, so both items are easily interchangeable. They are usually structures with wheels to facilitate rearranging furniture as well.