This straw is made of pure titanium without lining and premium coating. It is tasteless, odourless and non-toxic. Originally designed for hiking, camping and travel, this Keith Titanium straw is also ideal for picnics, home, school and office use. Titanium is ultra-light and super strong; it is environmentally friendly, biocompatible and bacteria-inhibitive; it is also extremely hypoallergenic and exceptionally resistant to corrosion.