Vaishnava Dharmashastra 79.22

79.22

ghṛtādidāne taijasāni pātrāṇi khaḍgapātrāṇi phalgupātrāṇi ca praśastāni ||

In offering the clarified butter and other (liquids, such as condiments, sour milk, milk, and the like) he must use metallic vessels, vessels made of the horn of the rhinoceros, and vessels made of the wood of the Phalgu tree.