Hello fellow travelers,
In our travel to Europe last week, we discovered that sugar substitutes are not easily available as it is here in the US... even in Starbucks.
If you are diabetic or use the sugar alternatives, bring a handful of packets in a little zip lock baggie. There are grocery store which sells them tablet forms in a small container.
Many places do carry them, but I would say 30% of the places we had coffee did not have them.
Just a little helpful FYI tip for those who need something to add to your trip list :)