I make unflavored for my sweetie and in my experience it does need time to infuse the different ingredients but not long at all. Last time I made it in the afternoon and heated it to 140°F for a short while and shook it a few times before I gave it to her about 3-4 hours later. Different viscosity liquids do not mix like magic because you shake them. They only separate in the bottle and it adds bubbles. Just my opinion based on personal first hand experience you must remember. Good Luck