Wawavita 16-Ounce/450ML Stainless Steel Thermos Mug, Stainless Steel Travel Mug, Vacuum Cup, Travel Mug, Travel Bottle, CHAMPAGNE 18/8 High Quality Food Grade 304 Stainless Steel material for inner and outer. Keep beverages hot or cold for hours. 450ML/16-Ounce capacity. Convenient one hand opening. Flip-Open lid with lock prevents the lid from opening accidentally. Double wall vacuum insulation, Non-leaching and toxin-free.