Ah sorry, forgot to mention I mix mine in a glass of cold oj and down it in seconds before it starts to thicken. Don't put it in anything warm, it thickens much quicker.
I did once sit down with it, got carried away reading a post on here and then almost choked when I tipped 250ml of jelly into my mouth and face...never again! I mix and drink it standing at the fridge now.