The first slip isn't surprising. Yuri is still in the middle of getting his first bite into his mouth, and so he can't quite get around it for a correction, but Yurio does well with fixing the most glaring of problems himself. The same as he probably would have done and figured out, with the help of his phone and a million videos, even if Yuri hadn't offered ( ... and then been asked ... ?) to help.

There's a swallow down of his first bite of noodles as Yurio digs in too deep and comes up, for a definition of the word which doesn't involve all that much upward movement, with too much on his chopsticks. Instantly with alarm in his voice, and that swearing that isn't directed at Yuri as much as the unasked question inside of it is. What do I do now? It reminds him of a child. All children made this mistakes. Over and over and over. Yuri still did sometimes if he was looking at his phone or someone else when picking something up.

Somehow Yuri couldn't explain if you asked him to go back to the second, he smiles and his shoulders come up with a small shake at the familiarity, the simple amusement of the panic of the innocuous. "You can just open them and it'll drop. Then, try again."

The same with the next second, when what comes out of his mouth, surprises even Yuri.
Light, and not-quite, but-almost, teasing: "Unless you want to swallow a third of your bowl already."