Wawavita 10-Ounce/300ML Stainless Steel Thermos Mug, Stainless Steel Travel Mug, Vacuum Cup, Travel Mug, Travel Bottle, Red 18/8 High Quality Food Grade 304 Stainless Steel for inner and outer wall. The insulated water bottle keeps beverages hot or cold for hours. 300ML/10-Ounce capacity thermos stainless steel water bottle. Convenient one hand opening. Flip-Open lid with lock prevents the lid from opening accidentally. Double wall vacuum insulation, Non-leaking and toxin-free.