Aurora Handblown Recycled Glass Tumblers (16 Oz, Set of 4)'There are very few natural displays of color that are as beautiful as the Aurora Borealis. That ethereal show of color produced by northern lights inspired the design of our 'Aurora' collection,' Cantel Blown Glass Artisans explain. They craft the juice glasses by hand, using traditional blown glass techniques featuring swirling lines of color like orange, yellow, green and red underscored by aqua blue. Because each piece is handmade, shape and size