Lewis & Short

sĭtŭla, ae, f. (masc. collat. form sĭtŭ-lus, Cato, R. R. 10, 2; 11, 3; Vitr. 10, 9 fin.; Fest. s. v. nanum, pp. 176 and 177 Müll.; Paul. Sent. 3, 7 fin.).

    1. 1. A bucket for drawing water, Plaut. Am. 2, 2, 39; Dig. 18, 1, 40 fin.; Poët. ap. Anthol. Burm. 1, p. 493; Non. s. v. creterra, p. 375, 6 Gerl.; cf. Becker, Gallus, 2, p. 268 (2d edit.).
    2. 2. An urn, used in drawing lots (instead of the usual sitella), Plaut. Cas. 2, 6, 7.

sĭtŭlus, i, v. situla init.