Cello product speaks volumes about the depth of research and the strength of perfection, and makes Cello the preferred brand. After years of research, Cello has developed unique, leak proof, 100% food grade, and hygienic products, which gives Cello the real winning edge. Cello’s “Steel Series” is made of Thermo seal technology. Insulated double walled vacuum flask is designed for maximum temperature retention that keeps the drinks hot/cold without altering their temperatures for prolonged period of time. Hence this avoids re-heating/boiling the drink which save gas, effort and time. Taste and nutritive value of drinks remains intact for a longer duration which makes Flasks very appropriate choice for storing beverages.