Not as such, but their own stainless steel squirter. I never asked them what goes in the cylinder, but what comes out tastes like unsweetened whipped cream to me.
You would have to ask them. Or look at the nutrition info on their website.
Personally, I would choose a sugarless drink with whipped cream on it, over a sugarless drink with milk in it. I doubt there is more sugar in 50mls of whipped cream than in 200mls of milk. But we can all make a judgement call on it.
I would prefer the cream, but then I gave up coffee 2? 3? years ago, so the whole question is academic for me - though I miss it daily.
This is a game-changer for me... In the Netherlands basically all (whipped) cream is sugared, so I avoided it. But yeah... If there's relatively little carbs in a proper squirt (what we call a "toefje"), that's... More than do-able! Thank you!