If you are making Stuart’s Coffee in a Tassimo and, like him, prefer Costa espresso over the Carte Noir, it’s annoying that you can’t buy them separately. Costa only sells these pods as part of their (horrible) UHT milk latte or cappucino kits, and that’s expensive! But some enterprising souls on eBay sell the milks and the coffee separately, and it’s much much cheaper: 96 Espresso Pods £34.99 or search here. Saves a packet: 37p vs 57p a cup, or basically £300 a year cheaper.
(The waste is a bit of a sickener though pods can be recycled through terracycle in a lot of places… but not everywhere.)