I have had a number of unforgettable and deeply educational tastings at Roederer over the years. This was one of the most fascinating. It is well known that wines show better from magnums. That is especially true with Champagne. But why? Roederer’s long time Chef de Caves Jean-Baptiste Lécaillon pulled out a remarkable selection of Cristal and Cristal Rosés earlier this year to show exactly why.