There were certain spells Rhys could have used. Things that would make such things easier. But he preferred watching the younger man struggle, wanted to see him learn how to do this properly. Of course he wouldn't get it on the first go, but he was a novice, yet. The Potions professor fully intended to change that, given enough time. Playing the teacher like this was more than a little fun.

"Think about what you're doing," he encouraged, amused. "You don't have to simply shove the whole thing in your mouth at once. Remember what I showed you, at first."