As a good Disney habit you can also shop of course. There are three shops on board.
Mickey’s Main Sail
Here you mostly find things for kids, toys and collector items like pins and vinylmations.
Here you mostly find clothes for adults, juwelry and more expensive souvenirs like figurines.
This is the tax free shop (mostly alcohol, you’ll find the perfume in White Caps). You can also buy O’Gills merchandise here.