Keep your beverages warm for longer hours in a cozy way with the Bamboo Thermos Flask. The flask will preserve your beverages for up to 12 hours. It has a thick stainless steel interior with a bamboo material covering up the exterior design. This gives the entire design a stylish look and feel. There are different engraved patterns to choose from. The flask looks pretty unconventional because of the bamboo design, and this is what makes it one of a kind. Made out of natural bamboo, this flask is truly innovative regarding how it looks and performs. A perfect Bamboo Thermos Flask for outdoor use.