After a bit of research I've purchased a new blender to make green (and other) smoothies. I decided on getting a Ninja Nutri blender. They have a few in their range, but I opted for the Auto -IQ one with a 1500w motor and it has a large pitcher blender jug as well as 3 sipper cups of various sizes. It is GREAT! You just put the ingredients in the cup/jug, fit it to the motor base and press the button. EASY!
Having a lot of fun experimenting with ingredients and steadily working through my green smoothies recipe book.