?This original Bamboo Travel Thermos is durable and handy. The straight cup is covered with Bamboo material while original stainless steel material keeps your liquids at the right temperature for a long time. Combined Stainless and bamboo cover tight-fitted to protect liquid from dust and leakage. The vacuum flask is ideal to store liquids like tea, coffee, juice, and drinkable water. Can easily fit into back bag when traveling, going for a walk, or other sport activities.