Metal Straws Our straws are food-grade 18/8 stainless steel metal with no metal aftertaste. Metal straws are easy to clean, dishwasher safe, and rust proof. Our reusable straws pair with tumblers, bottles, and cups in the following sizes: 20 oz, 18 oz, 12 oz, and 10 oz. Measurements: Length - 215mm; Width - 6mm. Bamboo Straws: Our reusable bamboo straws are made without any harmful pesticides or chemicals. To clean, rinse bamboo straws under tap water or submerge them in warm soapy water. For an occasional deeper clean, put the straws in boiling water with a tablespoon of vinegar and soak for a few minutes. Measurements: Length - 8in; Width - 4mm - 7mm (since bamboo grows naturally, the width varies). We use 100% PLASTIC FREE PACKAGING!