In my furnished apartment I found a 0.6 litres SIGG bottle from unknown year and previous tenant.
It makes the water taste bad (not clearly a metallic taste, somewhat different or more in addition to that) and also I found out that old SIGG bottles release BPA: http://www.consumerreports.org/cro/news/2011/07/some-aluminum-water-bottles-still-contain-bpa/index.htm
Supposing I decide not to use it anymore due to taste and/or BPA, any idea how to put it to use? I don't like to throw it away but the small opening does not allow many uses.
Since BPA may not be a real issue https://health.stackexchange.com/questions/1868/is-bpa-in-can-linings-a-health-concern how could I clean it?
- in the cap there is a "4" between a tilted "C" letter and a standard PP symbol. Maybe from 2004?
- the SIGG logo seems different from the current bottles, see photo
- the internal surface is lined with a golden material, see photo
- to clean the inside and to test the thermal insulation I filled it with some boiling water mixed with dish soap and rinsed very well
- the water still tastes strange when I tried it, after the cleaning