What, if any, are the truth conditions for the following sentence

Rhode Island milk stays fresher longer

We ended up having a long, if entirely digressive, discussion about this in a semantics reading group. I offered a Lepore-style answer, and it got a fairly familiar response. I’ll leave that answer to the extended section. If you have a proposed identification of the truth conditions, the comments board is open.

Here was my proposed answer, which I put forward as a proof that the sentence really does have truth conditions.

“Rhode Island milk stays fresher longer” is true iff Rhode Island milk stays fresher longer.

Am I right or am I right?!