Excellent material:Our travel coffee mugs are made of the highest quality 18/8 stainless steel,durable and rust resistant,leaving no metallic smell.In addition,it does not contain bisphenol a and is easy to clean.the thermos water bottle is perfect solution to replace hundreds of plastic water bottles. Keep heat and cold:Our stainless steel water bottle can keep cold and hot drinks (water, coffee, tea) for 12 hours at a low temperature,and keep heat for 12 hours. Prevent condensation from forming outside the bottle.The coffee thermal bottle offers dual service and can be kept warm all year round,making it the perfect choice for you. Safe and leak-proof:Our thermos cup has a small lid that doubles as a small cup to hydrate you.The inner cover is sealed with silicone ring and is leak-proof and resistant to high temperature and aging.Gently press the latch to open,the latch is firm and easy to operate. Perfect item:Our insulated water bottle is cute,stylish and small.The slim insulated coffee mug is easy to hold.Our coffee bottles are the perfect daily companion,whether for outdoor activities such as hiking,biking,camping,traveling or work.It is also an ideal item for birthdays,Christmas,Valentine's Day and other holidays.