Go to your local hobby shop the ones that sell models and rc cars they have hobby size paint shakers for around 30 bucks they shake around 5,000 shakes a minute i use this method every time i pour worms its nice to know your color is evenly mixed every time no question on color being off a shade due to poorly mixed coloring.i also put lil bearings in my bottles helps mix faster each bottle gets about a minute on the mixer