The Cape Verdean alcoholic drink ‘Grogue’, Fogo wine, coffee beans and the abundantly available local sweet make excellent souvenirs, and in Mindelo, Santiago, where the live music is said to be the best, CDs of local music can be bought to take back home with you.
For essential everyday shopping for things like toiletries, the island capitals are usually well stocked but outside of these towns it’s almost non existent.