Yeah, saw that earlier.
None of the bottles on their website are actually described as "Chubby Gorilla" bottles though.
Most of them see to resemble unicorn bottles.
As someone said earlier they are a legit legal firm, so you can't just ignore it.
Personally the two things I would do are.
Contact Baker & McKenzie, and explain the nature of your business, in that you are merely reselling bottles from a UK supplier, and what aspect of Chubby Gorilla Intellectual Property rights they believe you are breaching.
Contact both Lubrisolve, and I Bottles to make them aware of the situation, and ask for their comments.
Regards badboybez