I am writing this on behalf of Primus. I work for the company which is their distributor in the UK.
Primus designed the Eta PackLite to have a small pack size. This was one of their objectives. The stove is a remote canister design, so has a flexible gas hose that needs to be wrapped around the burner when stowing away. This makes it a bulkier unit than the EtaExpress burner, which is a sit-on top stove design.
So, as an important part of maintaining a small pack size is to stow the burner unit inside the cooking pot, Primus decided it would be better to make the pot big enough to cook a meal for 1 or 2 people but small enough to make a significant saving on space compared to their EtaPower stove. To achieve this meant there would be enough space for a 100g cartridge, but not enough for a 230g cartridge. (The pot also contains a roll-up windshield and pot protection liner which actually doubles up as a food-grade bowl, so Primus have managed to pack a lot of features into this new model). The Eta burner's efficiency is good enough that even a cartridge as small as the 100g size will provide sufficient fuel for two people cooking 3 meals a day for just over 2 day.
I hope this goes some way to address your queries. If not I'm sure I'll read your forum posts which will say otherwise!
Edited: 15/12/2008 at 20:16
