Souvenirs and Porto wine are all on sale in the Sintra historic district. There are a number of shops that sell standard tourist items post cards, t-shirts, etc. and a number of shops that sell ceramics, pieces of art and hand crafts. If you are looking for gifts for friends and family, Sintra has a broad selection of items to choose from.
To get something truly unique and local, consider cork products that range from wallets to umbrellas. These original products wear like leather and are environmentally sound, as well as attractive.