Medium Glass Straws for Pint Mason Jars and Pint Glasses (4 Pack + Cleaning Brush) Four 7 1/4" Long Glass Straws Plus One Straw Cleaner in a Cardboard Gift Box. The best glass straws you can buy for Pint (16oz) Mason jars, and also great for pint glasses and medium cups. All Purpose Size - 9mm outside diameter, 6mm inside diameter. Great for smoothies, water, cocktails, milk shakes, protein shakes, yogurt, milk, juice, iced tea, coffee, soda, and everything else! Beautiful - These hand made straws sparkle in the light, and make a lovely tinkling sound against your jar or glass. It is fun to see your beverage rising through the straw. Strong Glass - Borosilicate glass is the strongest type of glass available. It cracks into chunks rather than shattering if it does break. Dishwasher safe. Safe Material - Glass does not leach any chemicals like plastic can. Safe for any beverage and essential oils.