I just got Jake Original yesterday and have major troubles with the shaker.
When following the instructions (400ml water, powder on top) it barely fits inside and easily spills onto the kitchen counter. I'll try to follow the advice on here, a bit of water first, then powder, then more water and see how it goes.
The biggest problem I have is that the shaker doesn't properly form a seal. The opening to drink from seems to be pure plastic with no rubber ring, when putting the shaker upside down regardless of how firm I try to hold it closed it always spills at least a little and makes a mess.
Any tips? Or should I get a mixer?
Edit: Ohh.. nevermind. With a few minutes of pushing and pulling I finally managed to properly snap it closed and then it's a (really) tight fit. Stupid me ^^