Wawavita Stainless Steel 600ml/20-ounce Thermos Double Walled Vacuum Flask, Stainless Steel Travel Mug, Drink Bottle, camping Bottle, Outdoor Vacuum Bottle, Sports Travel Mug, Red 18/8 High Quality Food Grade 304 Stainless Steel material for inner and outer wall. The thermos water bottle keeps beverages hot or cold up to 24 hours (see product details). 600ML/20-Ounce capacity insulated stainless steel thermos water bottle. With Rope design, easy carrying and prevent lid loss. Double wall vacuum insulation, Non-leaking and toxin-free.