Arguably our most popular size, the Tru Flask 40 oz. is the perfect combination of size and sustainability. Whether you're a weekend warrior, tackling late hours at the office, or enjoying everything mother nature has to offer the 40 oz. helps you get it done.
- Wide Mouth opening
- Double-wall vacuum maintains optimal drink temperature, cold 24 hours and hot 12 hours
- Our most popular "adventure size" for the explorer or the long day at the office
- Resistant 18/8 stainless steel
- Interchangeable with all Tru Flask lids
- Limited Lifetime Warranty