I’m a professional singer and have had used my share of disposable coffee stirrers and straws. I was skeptical to make this purchase but so glad I did! It has changed my singing in just a few weeks. Everything feels so easy! My voice is smoother, more supported, and everything just feels right. I love the different size options to adjust for how my voice is feeling day to day or exercise to exercise. Highly recommend buying these straws and cups.