A kiste or cista was a kind of chest or basket. They are called cistae mysticae when employed in the mysteries to hold certain sacred items (it is a Christian author, Clement Alexandrinus, who preserves the most information on this); since mysteries and initiations are rare these days, perhaps the cista should now become a part of regular Hellenist cult instead, simply a holy place to store holy things, such as religious tokens and symbols, and the instruments of sacrifice.
Objects to put in your Bacchic cista mystica include:
-Live snakes, if you like to live dangerous
-Toys (e.g. dice, ball, hoop, apples, top, looking-glass, tuft of wool)
-Phallic symbols (dildos, for example, or Priapean amulets - but really, why not any sex toys)
The snakes and the phallic symbols don’t seem to be exclusive to Dionysiac rites. Even a Christian sect, the Ophites, employed a cista containing a snake in their Eucharist mystery, or at least Epiphanius claimed they did.
Generally, a cultic casket may also contain (some of these are clearly foodstuff for sacrifice):
-Sesame cakes, pyramidal cakes, globular and flat cakes and lumps of salt, pomegranates, branches and rods, round cakes and poppy seeds
And certain symbols of Themis:
-Marjoram, a lamp, a sword, a woman’s comb
Somewhere, but I don’t remember where, I also read that at Eleusis (where there was actually not only a cista, but in addition a basket used in the mysteries), the cista contained agricultural tools.