I found using a small handheld blender works the best for mixing Zandopa with water. I will use a regular coffee mug, fill it half way with warm water, add Zandopa, mix with the blender and then I will add juice (cranberry, grape etc) for flavoring. This blender is inexspensive (under $20) and can be found at most homeware stores.
Take care, Max
PS I've been taking mucuna for 15 months now with excellent results, but I still need to add a little bit of Sinemet to help it along.