"No, you berk, I was making paint base, you know the bit of my job that requires me to use my Potions OWL, it got contaminated and exploded and it just found gaps and where it didn't find gaps it soaked through," he shuddered theatrically. "And I've told you nudity is a perfectly valid way of staying cool and saving clothing when you're not expecting clients and your colleagues respect closed doors in the baking heat." He swiped half-heartedly at Seamus and just rolled his eyes when he jumped out of the way. "So, no. It's August, not a July heatwave."
"Butterbeer is tempting but I'll have tea please. Not planning on going back, don't need the caffeine hit. Might take my potion and get sleep so no booze." He shrugged.