ABOUT THE KWISY PRODUCT - Why drink your favourite beverage out of the same, boring glass you've used a million times before? Experience a new design that makes your drinks taste better. We are obsessed with delivering excellence by using only the highest quality materials, and standing behind our products to ensure your satisfaction. 1. Enhances Taste 2. Spill-Proof 3.Professional Lead-Free Glass 4. Ready to Gift in Beautiful Packaging.