Y'know, I was going to ask them that, but I forgot. Maybe I should email them.

Nope, the website says:

Using a lead-free alloy developed in the late 1790’s, Three Feathers Pewter ® creates functional pieces in the Early American style, including plates, goblets, spoons, bowls, and candlesticks as well as buttons from various historical periods and jewelry of traditional symbols and shapes.

So we're good.