Not OP but, yes. Circular needles are each connected on one end by a cable (or similar). They are typically used to make tubes without seams. Like how most socks are a continuous tube (except for the heel and toe). Most sweaters aren’t done on circular needles (although they can be). If you look at how most sweaters are constructed, you can see that the front and back are single blocks that are stitched together at the sides
I saw that some bodegas in NYC are selling egg loosies. They referred to them as loosies but they were 3 eggs in a plastic bag.