NOVICA 255877 Lime Bubbles' -Blown Highball Glasses (6 Set), 6" Tall, Green Because each piece is handmade, shape and size can vary slightly and tiny bubbles may appear within the glass Featuring six in the set, each glass is masterfully crafted by hand with millenary blown glass techniques whereby the artisan picks the molten glass with one end of a metal pipe He then turns the pipe while at the same time blowing through it as well as shaping the glass with his free hand