杯具里的洗具
[bēi jù lĭ de xĭ jù]
It plays on a homophonic pun of Chinese. Here '杯具'(bei ju), which literally means drinking cups, sounds just like '悲剧' (beiju) meaning 'tragedy'. And similarly, 洗具(xi ju), meaning bathroom items like toothpaste cup, can be a homophone of '喜剧'(xiju) meaning 'comedy'. So together, the username expresses how tragedy can turn into comedy. It reflects people's wisdom to laugh at tragedies with an open mind in a more light-hearted manner.