Feature: 1.This cup leakproof design,you can put into you bag. 2.Another section cup with a warm function (about 6-12 hours), suitable for office ,home ,travel use. 3.Thermal effect : 100c,after 12hours ,can be kept over 38c in summer, and over 38c after 6 hours in winter . 4.Double wall 304 stainless steel inner avoid of unhealthful chemical substances when using under high temperature. 5.Usually new cups will have little smell ,before use please pour into some hot water, remove the smell. 6.Fresh, brief ,healthy are our cups special feature different with other cups Capacity:350ML/500ML(500ML=400-500ML) 350ml effective use volume is 320-340ml The effective use volume of 500ml is 400-500ml,Mindful friends buy carefully!!! Please be careful to buy, if there is any quality problem, please contact customer service for the first time, waiting for customer service to help you solve all problems. Thermal Insulation time:6-12 hours Material: High quality stainless steel Applications:Travel, School, Business gifts 1 cm=0.394 inch 1 inch=2.54 cm Package included:1PC*Thermo Cup