Made of 18/8 Stainless Steel that durable enough for repeated daily use. Silicone straw which is suitable for cold and hot drinks. Precision engineering protects your pocket straws from external factors, and key rings enable you to carry them with you anytime, anywhere. It can be folded to a small part of its volume for easy transportation; small and light container can store cleaning brush and straw; it is suitable for hand, pocket, car console and even kitchen drawer. Telescopic design from 4 inches to 9 inches, suitable for any size of glass; for smoothies, iced coffee, adult drinks, etc.