As TikTok challenges go, this is one of the more impressive feats we’ve witnessed while trying to escape the boredom of quarantine life.

On Monday, five-time Olympic gold medalist Katie Ledecky swam a 50-meter pool length while balancing a glass of milk on her head (chocolate, by the looks of it). Completing the course in around 35 seconds, it was, quite possibly, one of the best swims of Ledecky’s illustrious career — certainly deserving of the celebratory sip she took at the end.