The Triumph of Bacchus frieze on this pair of wine coolers is derived from a late 2nd-century Roman sarcophagus in the Vatican Museum, engravings of which were published by E. Q. Visconti in Museo Pio-Clementio, between 1782 and 1802 (see D. Udy, "Piranesi's 'Vasi,' the English Silversmith and his Patrons," Burlington Magazine, December 1978, pp. 828-29).
Looking to antiquity for inspiration, designers including John Flaxman used engravings of Roman archaeological discoveries published by Piranesi, Visconti and others. It is known, for example, that the Storr workshop owned a number of Piranesi's engravings, and it seems almost certain that the workshop, or the firm's retailer Rundell's, also had copies of Visconti's work.
Other wine coolers in this style include a pair in white silver in the Jerome and Rita Gans Collection at the Virginia Museum of Fine Art, and a single example at the Victoria and Albert Museum (see Joseph Bliss, The Gerome and Rita Gans Collection of English Silver on Loan to The Virginia Museum of Fine Arts, n.d., pp. 188-190)