Prestige Hi Dome Pressure Cooker Review

I have just purchased a 5L High Dome pressure cooker and am really dissapointed that nowhere did it say that I would not be able to make sponge puddings for a family because I needed the 6L SIZE. With no one to ask this question as it was bought at an Argos store and nothing mentioned in the instructions I feel very annoyed, an cannot afford to purchase another model.As I have used it for making chicken and vegetable soup I know that I will not be able to return it.