Created with Villarceau circles, with 20 iterations paired around the original torus. The tubes are 1mm thick. Any size is possible on thickness and number of iterations. Apologies to whoever ordered this. Shapeways rejected the model because of thin walls (0.99mm).
Increased size of wall by 1.01010101010101 to make the walls 1mm thick. A little 'pedantic' of them.