Baby bathtub

The bathrooms in our home are shower-only/do not have bathtubs. Is anyone else in a similar situation? I currently have a Skip Hop tub (pic shown)

but my son has recently started getting adventurous and trying to reach outside of the tub to better explore the shower. I’m worried he might partially fall out of the tub so I’d like to get something higher. I want to use an actual bathtub product. Any suggestions?