A hefty base makes the Ascutney a durable drinking glass for water, juice, or cocktails. The collection is Handmade by Simon Pearce glassblowers using centuries-old techniques and it is Made in the USA. Dishwasher-safe, though handwashing is recommended, and it's suggested that you use a mild detergent on a warm, gentle cycle. The drinkware is not intended for use in microwaves or ovens. Do not expose these glasses to extreme heat changes, such as filling them with hot liquid or placing the drinkware in the freezer. A shock in temperature can cause fractures. Simon Pearce is Made in the USA.