Any ideas for tea time invitations?

We already have some in our collection, but the team is working on some more. But I wonder if it is worth the time and effort. Do we really have tea these days? I mean proper tea, in fine china, linen cloth, napkins, silver, pouring etiquette, etc... Or is it just something from a Dowager's world? Nevertheless I, we, love our tea, we love to tea, so we need invitations. Any suggestions or ideas for our new designs?