Yes, rice protein powder can be added to milk, though we suggest a low or no-fat milk. For vegans, almond or soy milk can make a good substitute.
Yes you can add pea protein powder to milk, but preferably low or no-fat milk. For vegans you can substitute with almond or soy milk.
Yes you can mix hemp protein powder with milk, though as always hemp takes more vigorous shaking to ensure there are no clumps.
Yes, most plant protein powders tend to taste better with milk and provide a smoother result.
Yes, casein tends to taste better with milk and as you are likely using casein before bed, milk can also aid with digestion speed.