Bad Sauerbrunn (today Bílinská Kyselka). The spa was built by the Lobkowicz noble family and later made known nationwide by the spa doctor F. A. Reuss. As early as the 16th century, the mineral water was filled into clay jars, poured over with wax and sent to customers in the wider area. From 1870 bottles replaced jugs, an entire industry was made from them and Russia, Brazil and many other countries were supplied. Beneficial and healing effects are attributed to the water for stomach, intestine, kidney, bladder and many other, even neurotic, ailments. There were also "digestion tents" and lozenges made from the salt.