Bathroom Improvement

I am wondering about replacing my tub completely. But as I search for a tub I am running into an issue……
I keep finding that the tubs I like and look nice with a good price tag are referred to as “Drop In” tubs. So please someone tell me if this means that the “Drop In” tub needs to go inside of an existing tub or does it mean it is a regular tub that needs some sort of a surrounding?

If the answer is a surrounding what would be the best suggestion for building a nice enclosure for a jet, spa tub?

Thanks!

wash basin, bath tub, etc in my bathroom are in pinkish shade, tiles are off white with pink lines in background..I am now planing interior design for master bed and want everything in White , simply everything white..
Is it a good idea to keep the bathroom pink and room in white ? I mean would it look good ?

The bath room is attached

Thanks

We’ve recently remodeled and added onto our house. We’re almost ready to paint the new bathroom. It’s a nice sized bath w/ a whirlpool corner tub and a vaulted ceiling. We chose grey tile and kind of want to use black and white for accessories/decorating. Any ideas on what colors would go w/ the walls? I like all kinds, so any ideas are good. If you have pics I would love to see them! Thanks!