Right, I heard that in some place in the world they have striped ice cream like that, though I've never seen it or hadn't heard of it before. It could be nothing.
But also - why have Tom eat anything? Why not single-color normal ice cream, like what Ludo is licking in some scene I forgot in which ep? Why have the colors specifically in the pan flag order?
I mean, there are a lot of people like me who've never heard of striped ice cream actually coming in those colors, and who will automatically assume it's an intentional hint. If it's meant to be just ice cream, nothing more, why confuse people like that? Sorry, but I can't believe it'd be accidental - it's a choice, but why?
At the least, it's a joke, Nefcy gloriously trolling the tumblr fanbase and shippers with false hints and giggling as they go crazy with theories. Or it could be genuine.