Tönissteiner brand is owned by Dr. C. Kerstiens GmbH in Germany.

Tönissteier springs were used by the ancient Romans of Germania more than 2000 years ago. Tönissteier owes its taste to its home in the Vulkaneifel. The Tönissteier springs reach a depth of up to 652 m. They are among the deepest and richest springs in Germany.

Company Web Site : https://www.toenissteiner.com/