Would it be suitable to use Kitchen caupboards in the bathroom? There seems to be a wider range of units and styles to choose from.

I used kitchen cupboards in my bathroom and also used the wicker baskets you can get to replace some of the drawers which look lovely and are great for storage of all my wife's toiletries ! I even used a wall unit cut down to conceal a cistern on the toilet which looks bespoke.

Can't see why not as there made of the same material.might look a bit odd though.

Yes did it in my own bathroom years ago.

Hi It is not recommend as the bathroom range units are more moisture resistant.