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.
I want a traveling tea set!!! "In 1930, Louis Vuitton delivered its version of this tea case, an elegant and practical piece designed to be compact and yet easy to remove and use. The case contains cups, pots and all the other paraphernalia for a proper cup of tea on the road." Yes, want please