Who drinks tea from cookware? Maybe a cup or a mug but cookware? What is the settlement they offered and what are the circumstances of the accident? Do you offer a warrantee on the product on a website perhaps? Are you the manufacturer or just a seller? Is the cookware microwave safe? Was the item dropped before use? What damage did the buyer suffer? Lots of questions.
How do you know it is a legitimate settlement letter from a real law firm (anyone can print letterhead). They are after all in the UK. Maybe it's a scam. What proof did they offer, medical bills, pictures of first degree burns, what?
Liability defense lawyers don't come cheap so if I were you, I would be doing a lot of research before hiring one.

