Tea

Tea is a hot, sweet liquid. Sensei Wu loves drinking tea. In fact, when meeting all of the ninjas (except Kai), he was drinking tea. It even became a running gag that he was drinking tea at the strangest moments.

When used in Episodes
In Tick Tock, Sensei uses Traveler's Tea to get Lord Garmadon.

In The Royal Blacksmiths, Lou served lemon-honey tea to the ninjas.

In All of Nothing Sensei used the Tea and dumps it on Lasha's Face.

In The Rise of the Great Devourer, Sesnei Wu offered Chokun some Tea, but then punches him off.

In The Day of The Great Devourer Lord Garmadon bought some traveler's tea to get back home