DALIMAN Innovative Vacuum Insulated Travel Coffee Mug, 15-Ounce Double Wall Stainless Steel for Men/Women(Green) It use standard 18/8 stainless steel inner pot and senior tea strainer, keep hot for more than 8 hours Food-grade PP material + food-grade Silicone mug cover, safe, environmentally friendly and healthy. With innovative magic chuck, powerful suction.The travel mug locks in place when the bottom is on a flat surface. Practical tank shell separated design ensure the mug will not tip over when you accidentally knock into it. Youthful and brief appearance design. Totally brand-new and high-quality