Follow-up to this:
I've prowled around on the Splendid Spoon Website and even exchanged messages with them.
Every item is described as containing 2 servings.
The breakfast items seem to be entirely smoothies.
The protein content of most of the items is quite low.
The meal plans offered don't seem to have much leeway. You can't order just dinners, so far as I can figure out.
And I found out that the food is "frozen/cold" when it arrives. Except for the smoothies, which have an expiration date, the food can be stored for 1-3 months in the freezer or refrigerated for a week.