Another pointer for you guys travelling to Sao Miguel having just returned from there myself.
You can NOT buy "Real" milk from any shop or supermarket. Its it UHT milk only. We tried everywhere but to no avail.
I asked about this in a restaurant one evening and was told that apparently 6-7 years ago
there were issues with the quality of fresh milk being produced my farmers on the island as so it was banned from sale.
This is VERY strange considering the amount of farms and cows you see everywhere on this amazingly green island.
So if you enjoy your cup of tea/coffee with proper milk you wont be able to drink it in the manner while your in Sao Miguel.