When Eleanor of Aquitaine married Louis VII of France in 1137, she gave him the rock crystal vase on the left as a wedding present. The inscription on it says he, in turn, gave it to the Abbey of St.-Denis. It is now in the Louvre in Paris and is the only artifact of Eleanor's known to exist today.
The piece on the right is part of a crystal and gold posset set the Spanish Ambassador gave Mary I of England and Philip II of Spain as a betrothal gift. It was made by Benvenuto Cellini and the whole set is now on display at Hatfield House (England).