NBP-1 bullet shape vacuum flask produced under the brand name BIOSTAL refers to the premium AUTO series. Flasks of this series are made using the most advanced energy-efficient technologies and more effective isolating materials, as well as the newest technology of vacuum-pumping. This flask is designed for hot and cold beverages (tea, coffee, etc.) and supplied with two stoppers (the second stopper as a free gift). A plug stopper is reliable, easy to use, allows to keep heat longer due to additional thermal isolation. A handy stopper with a button allows to pour beverages to the cup without unscrewing the stopper, you just need to push the button.