If you use metal straws and hate that clinking sound against your cup, these silicone tips are about to change your life! This 8-pack gives you plenty of extras to keep around. They fit perfectly on any 0.31 inch (8mm) diameter straws - think stainless steel, glass, or pretty much any reusable straw you might have. The food-grade silicone is completely BPA free and feels soft against your teeth - no more that uncomfortable metal-on-teeth sensation with cold drinks. They slide right onto the bottom of your straw and create a cushion that protects your cup from scratches while eliminating that annoying tapping sound. The different colors are actually useful - you can color-code for family members or just mix and match for fun. Since they're used for drinking, it's smart to replace them every few months, and with 8 in the pack, you're set for a good while. They're easy to clean - just rinse with warm water and soap. Whether you have Stanley cups, Yeti, or any other tumblers with metal straws, these little tips make the drinking experience so much better. No more metal taste, no more tooth sensitivity, and no more worrying about damaging your expensive cups. Such a simple solution that you'll wonder why you didn't get these sooner!