Bulk Ice Tray/Bag/Thingamajig?

[Venari]

I seem to recall hearing, many years ago, of a silicone bag type thing that you just pour water into, and once the water freezes into ice cubes, you twist the whole thing and the ice cubes come out the end.

I can't find this on google. Does anybody know of a simple way to make bulk ice, or know where I can find this thing?

 

[Homercidal]

I've seen silicone trays and plastic bags for making cube, but no silicone bags. That would be a cool invention, though.