Enviro Glass Smoothie Straw 10" Straight, 2-PackAll glass straw combo packs come with two straws and a stainless steel cleaning brush. The smoothie sized 12mm diameter is designed for thicker liquids such as smoothies, milkshakes and juices. 10" is ideal for large (24oz) cups large mason jars, to go cups, blender containers and generally your taller glassware. These straws are handmade on Vancouver Island using Simax glass, the highest quality borosilicate glass on the market.