What is the Dopper (Solid) Steel made of?

The Dopper Steel is made of 18/8 Steel (bottle and the cap), ABS (the white cup) and Silicone (the sealing rings in the cap & cup).

The Solid Steel is made of 18/8 Steel (bottle), Tritan (the white cup), Polypropyleen (the cap), TPE (the sealing ring in the cap) and Silicone (the ring in de cup). 

All Dopper bottles complies with the European (No 1935/2004) and Americain ( FDA) legislation for products that come into contact with food. The Dopper bottles are BPA, Phthalate and lead free.