Double Glass Advertising Mug with Lid 1,eco-friendly 2,heat resistant,no toxic, 3, ... free,100%recyclable 4,use dishwasher Double Glass Advertising Mug with Lid Product Description: 1,made of high grade borosilciate glass ... ,eco-friendly,heat resistant,do not have lead 4,filter: tea filter inside with four springs to regulate the degree or lightness 5 ...