They also drank blood
Your question asked if Orcs are "ever shown drinking anything besides orc draught". Other answers here have already showed that Orcs drink water, so I will show something else that they drunk.
From a circa 1968 typescript found among Tolkien's linguistic papers:
C[ommon]E[ladrin] *khōn-, khond- was only used of the physical heart, and that was not regarded as or supposed to be a centre of either emotion or thought. Thus when Treebeard uses the adjectives morimaitë, sincahonda ' black-handed, flint-hearted' of the Orks, these were both physical in reference - as indeed were all the other adjectives, whatever they may have implied with regard to Orkish minds and characters. Sincahonda referred to their immense
staying power in exertion, marching, running, or climbing, which gave rise to the jesting assertion that their hearts must have been made of some exceedingly hard substance; it did not mean pitiless. The last adjective 'blood-thirsty' (serkilixa) was also literal: the Orks actually drank the blood of their victims. A compound of similar kind meaning 'hard-hearted, pitiless', would have been in Quenya ondórëa.
The Nature of Middle-earth - "Gender and Sex", footnote