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), 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.