Newer purple Hydro Flask. Bottom seal (center of bottom as tested through purple coating): 3,647 ppm lead & 1,013 ppm arsenic. Tested with an XRF instrument. The lead is on the outside and does not touch the contents of the bottle.
Note: other brands have no lead at all. This brand historically used lead solder to seal the bottom of their bottle and then it is covered in a coating (in this case the purple color.) These photos show the coating wearing on the bottom.
Once that lead is exposed (once the coating wears more on the bottom) it does become available to the user (it will test positive with a swab / wears of with washing, etc.)
In conversations with Hydro Flask (following the testing of this bottle) I was told they no longer use lead. This bottle was tested with an XRF in December 2015 and purchased new earlier in 2015.
Newer Hydro Flasks (2017 and newer, based on what I have tested) seem to be consistently lead-free! In 2015/2016 Hydro Flask had offered to replace the leaded product with a lead-free product, so it might be worth giving them a call to ask for a lead-free replacement if you have an older product!
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