The machine uses only original Caffitaly capsules, designed specifically for this system. It is not compatible with Nespresso capsules or other types of capsules, including plastic capsules from older models. You must therefore use Caffitaly capsules, which may be made of aluminium or other materials, but always from the Caffitaly system adapted to this machine. The original plastic capsules you own are not compatible with this machine.

It seems to me that your answer is wrong, I bought some capsules that were on the bottom of the machine with the words "Suitable", but they are too small, they go straight through. The old ones, which I still had, work fine though... In the manual, they say they should have the letter R next to the date. The old ones I have have the -R. Not the metal ones you recommend, which are suitable for a Nespresso machine.