Superb Antique French Kiln-fired Enamel Snuff Box, Paste Faux Diamond Frame, late 1700s.
A late 19th century Austrian silver and enamel elliptical snuff box by Georg A. Scheidt, Vienna.
Art Nouveau box
Tea & sugar were both mostly import items in the 18th Century and would literally be locked away in caddies like this, along with silver, porcelain, & glassware in more affluent homes, because of their value. Most were kept in "butler pantries" of which only the butler or owners may have the key. Sometimes butlers would literally sleep or have their office set up in the pantry as well.
A Fine Louis XVI Jewelled and Enamelled Gold Snuff Box with a Miniature depicting the Comtesse Dubarry (1741-1793)