Wentworth Pewter4oz Plain Pewter Pocket Flask

First, when I rinsed out the new flask, several metal shards like the one in the picture came out. After rinsing, I poured some bourbon into the flask. A few hours later, the bourbon had turned much darker, as you can see in the picture. Clearly there is either lead solder or some other sub-standard metal in this flask. Returned for refund.