Vase with a smooth cylindrical body, a folded annular base, and a round foot. The connecting stem consists of two bulges enclosing the doughnut knop, on which blue glass buttons have been applied. Both the form and the decoration are evidence that the vase was inspired by Veneto glassmaking.

The use of vases of this shape for scientific purposes is attested in the manuscript diaries of the Accademia del Cimento, preserved in the Biblioteca Nazionale Centrale of Florence. The vase was employed as a vessel for liquids whose specific gravity was to be determined by means of hydrometers.