The founder has been a lampworker (glassblower) for over 10 years and created the GlassDharma line of glass drinking straws not just because they promote health and are environmentally friendly, but that they do these things with elegance and style.Glass straws don’t leach toxins into your food as you drink and are made of borosilicate tubing, the strongest glass commercially available. They have spared no expense in bringing you the strongest, most durable drinking straw possible. Great for hot or cold drinks, microwave and dishwasher safe. Fully backed by a 100% Satisfaction Guarantee; covered by an unbelievable Lifetime Guarantee - means that if they ever break, they'll replace them - Free. Hand-made in the U.S.A.