AVOIN colorlife 61 Ounce Vacuum Insulated Flask - Double Walled Stainless Steel (BPA Free) with Drinking Mug for Hiking/Camping/Exercising and More UNIQUE VACUUM INSULATION TECHNOLOGY  Designed to keep liquids hot for 12 hours, and cold for 24 hours, making it great for any occasion whether it's hiking, camping, exercising or travel 100% LEAK-PROOF AND WORRY-FREE  The high quality silicone gaskets keep this flask leak-proof and because of the double wall insulation, the body stays cool to the touch with hot beverages and condensation-free with cold beverages NON-TOXIC AND 100% BPA FREE  100% pure high-quality food grade 18/304 stainless steel interior - Non-leaching & toxin-free. Eco friendly and shatter resistant, durable and safe to use by the whole family EASY TO CARRY WITH YOU ANYWHERE  Collapsible handle and detachable shoulder strap make it easy to take beverages with you anywhere you go; Convenient twist lid can double as 2 travel cups EASY TO CLEAN AND EVERYDAY USE  Extra wide mouth (7.5 cm/2.95 inch) accommodates big size ice cubes for cold beverages; and with wide mouth, you can clean all corners of the flask easily