1Premium Material: Made of premium 304 stainless steel for inner and 201 stainless steel for outer, the vacuum cup is wear resistant, corrosion resistant, safe to use. 2Large Mouth: The vacuum insulated bottle has large mouth, which is convenient for users to clean, and stainless filter, you can put tea leaves in it. 3Heat Preservation: The insulated water bottle can preserve heat for a long time, with the help of hand strap, it is convenient for you to take or suspend, occupy little space. 4Assured: The portable vacuum cup is glossy, made of food grade material rather than manganese and other harmful elements, safe and healthy for you to use. 5Suitable: The stainless steel water bottle is suitable for sport, car, office, business travel, daily, home and outdoor activities, you can use it to meet your personalized needs.