I hired the old style safe n sound capsule through the Ambulance for 6 months (he's actually just come out of it at just past 4 1/2 months cos he's too long now) and one day I thought I'll just see if I can sit it in the pram. Well, it fitted into the pram. It doesn't click in but it won't fall out because it sits actually INTO the pram. I have a Peg Perego Pliko 3 which is a few years old now but they do still make the same model. I had the back laid down and it fits perfectly in behind the front bar really nice and snug. So, IMO you don't need to buy the specific ones where you might end up with the capsule or pram which you don't really want but have to get to suit the other if you know what I mean. Also, the capsule is I think about $70 to hire for 6 months.