Try Clearspring Miso soup, it's like a bouillon, has 28 calories per sachet, 1.5g of carbs and 0.8g of sodium. Really tasty and warming. It's actually Japanese and you don't see many of them with a weight problem!
As I've mentioned on my Blog, I've tried a couple of things in order to try and stick to tfr, one is to mix and match with a couple of products from other tfr ranges (I've tried Exante and Be-YU both of which are really nice) and to have the odd diet coke and use a low-calorie squash in order to manage to get the water down! I have gleaned from other forums that diet zero has no citric acid whereas diet coke has so I'm going to pick up the former when I shop later.
It may well have slowed my weight loss by a lb or two but without it I really wouldn't be able to get water down or take
extra medication when I need to. TBH I'm willing to sacrifice the odd lb a week if my little tweaks to the diet help me stick to it in the longer term........
I realise that I'm not playing by the rules but TBH I never have, I've always been a bit of a rebel!