For soups, I used a little Nigella mini whisk (like a mini balloon whisk) - water in bowl, tip in contents and whisk for a minute of so. Lovely and no lumps!
For my hot chocolate - a hand blender as the LL choccie shake had a tendency to be lumpy. Hoping to start Exante in the next week or so, so I will be applying the same principles as when I was on LL.