You should not feel obligated to chunk your change into a tip jar but if you are with a client and want to add to a tip jar for the sake of appearances, add a dollar bill, not your spare change.

你不必认为往小费盒里放钱是你的义务。但是当你和客户一起时，为了引起注意，可以放一美元进去，但是不要放零钱进去。

youdao

You should not feel obligated to chunk your change into a tip jar but if you are with a client and want to add to a tip jar for the sake of appearances, add a dollar bill, not your spare change.

你不必认为往小费盒里放钱是你的义务。但是当你和客户一起时，为了引起注意，可以放一美元进去，但是不要放零钱进去。

youdao