[f. SPONGE sb.1 + -FUL 2.] As much as fills a sponge.
1857. Christian Repository, 2 April, 4/1. I made a rush to the door, with a spongeful of water.
1867. J. Macgregor, Rob Roy on Baltic, 243. We ran the canoe into a mass of tall reeds, to see if she had got any water. There were only three spongefuls.
1871. Napheys, Prev. & Cure Dis., II. iv. 537. A spongeful of warm water.