ote fulu double wall borosilicate glass cup lead free heat resistant mug with floating gourd design insulated tumbler for hot cold drinks unique gift for home kitchen lovers1. Pre Purchase Notes This is a hand blown glass product. Minor imperfections such as slight bubbles, water ripples, tiny scratches, black spots, and uneven edges are normal characteristics of handcrafted glassware, and are not considered defects. Due to the complex manufacturing process, minor seams and subtle material lines may appear on the product surface. These are natural features of hand blown items. 2. Important Precautions Do NOT use in