this is like the stock version of my /x/ cup

I've had it for over 10 years. it says not to drink from it but I use it to drink blood and like idk wine n stuff

I remember I had it sit under like two moons filled with salt and alcohol and blood once and it like changed chemically. the silver lining came off.

when I drink from it it gives me a brief splitting headache like I am dying. is that lead? how do I tell if it is a lead pewter? I took the specific gravity against its volume and it looked to be copper. I mean if it's like 2 percent lead I'm not going to die right?