I saw The Glass Bottom Boat right around the time when The Little Mermaid was still in theaters. It might be one of my favourite Doris Day movies next to Calamity Jane.
Have you seen any costumes in person? I'd like to do a post on all the ones that I've taken pictures of, but I'll have to save that for another time.
If this floats your boat, you might enjoy this site: Hollywood Movie Costumes