For water, juice, smoothies etc…..you can certainly drink any liquid through them!
The most reliable way to clean reusable straws is with the straw cleaner with soap and hot water. They are also dishwasher safe, or a quick rinse might be sufficient. You can also boil these to disinfect them if you want to. My personal cleaning routine is to rinse them after use, put them in the dishwasher, then run a straw cleaner through them and rinse again before putting them away. My dishwasher usually gets them clean but sometimes leaves a little residue so this ensures they are clean.
Stainless Steel is one of the most commonly used materials in the kitchen, used to make cookware, utensils, commercial food processing and storage equipment, and more.
Stainless steel will not leach any chemicals into your beverage like plastic can.
Did you know that every day, 500 million disposable straws are used in the US! You could use these straws for the rest of your life!