Vacuum Insulated Thermos Stainless Steel Canteen Camping Bottle Flask 1l 33oz Holds a generous 33fl. oz. just over 13 3/4 Inches (35 cm) long, It even comes with TWO mugs so you can share! And at just over 13 3/4 (35 cm) long, it will fit neatly into even the smallest backpack or picnic basket. The ultimate in double-insulated vacuum bottles combines sleek, modern design with heavy duty easy-clean Teflon This handy flask easily maintains the temperature of hot or cold drinks for hours.