Muzeum Mattoni, Mineral water museum in Kyselka, Czech Republic.

Muzeum Mattoni is a mineral water museum in Kyselka that displays historical documents, vintage photographs, trademark certificates, and business correspondence from the bottling industry. The collection documents the industry's development through original business records and visual materials.

The museum opened in July 2016 in the protected Löschner Pavilion, a building originally used for bottling mineral water from the spring of the same name. The pavilion was renovated from December 2013 to January 2015 at a cost of 20 million CZK. In spring 2023 the collections grew with exhibits from the former Mattoni museum in Nejdek.

The museum is named after Heinrich Mattoni, who built Kyselka's mineral water trade; the company Mattoni 1873 continues it. Visitors see a collection of bottles and historical and current labels, plus a cast-iron eagle originally on a Kyselka spa building.

The museum is easy to reach on foot and the exhibition spaces are laid out clearly, so a visit does not take much time. Visitors should check opening times before traveling since these vary by season.

The museum holds a 16th-century clock mechanism from the tower of the church in Radošov, now part of Kyselka. In spring 2023 it also gained exhibits from the former Mattoni museum in Nejdek, including an 1890 corking machine and 1930s bottles still holding their original mineral water.