These glass straws are great for enticing kids to drink more water, and are safe for hot drinks as well. When my kids are sick, I have them drink warm broth through a straw and it makes them feel special. They’re easy to clean, colorful, and made of the strongest commercially available borosilicate “Pyrex” glass, which is shatter-resistant and more durable than competing products! Measures 9 in x 12 mm. They are also dishwasher safe.