somehow I've never seen this shape before? it's like a double Mobius strip

if you twisted the cross section 90 degrees each loop, you'd get 4 connected sides. if you twist it 180 degrees (like here), you get 2 pairs of connected and opposite sides x.com/PhysInHistory/status/1892892736048468367

follow up question: can you get 2 pairs of connected and adjacent faces?

it probably needs to cross over itself at that point