This may not have always been the case, per the other reply to this comment. In my experience that is correct, because we cut them open and there was no such be

This may not have always been the case, per the other reply to this comment. In my experience that is correct, because we cut them open and there was no such beads, just an opaque gel that, while could've been simply water, didn't seem like it (I've never seen "pure" water in a gelatinous form). I only recall reading that it was drain-safe, so maybe that supports the water theory (though we put much more than water down drains), or at least some mostly-safe substance.