Kautilya's Arthashastra 2.19.35

2.19.35

rasasya tu surāyāḥ puṣpaphalayos tuṣāṅgārāṇāṃ sudhāyāś ca śikhāmānaṃ dviguṇottarā vṛddhiḥ //

But liquids shall always be measured level to the mouth of the measure.

With regard to wine, flowers, fruits, bran, charcoal and slaked lime, twice the quantity of the heaped-up portion (i.e., ¼th of the measure) shall be given in excess. 1¼ panas is the price of a drona. ¾ pana,, an ádhaka. 6 máshas,, a prastha. 1 másha,, a kudumba.