Summarize this article in one sentence.
Combining the ingredients in a blender is the most convenient way to make a shake. Follow the instructions on the whey protein container to measure out the proper amount of whey protein powder and blend with the recommended portion of liquid and any other ingredients until smooth. If you do not have a blender, you can use an electric mixer, blender bottle, or use a whisk or fork to mix the ingredients in a glass or bowl. You can buy whey protein in a variety of flavors, which will affect the taste of your smoothie. Flavors include vanilla, strawberry, blueberry, banana, chocolate, and more. Whey protein shakes can be made with fruits and other ingredients to change the flavor and nutritional content. Many recipes can be found in books and online for various preparations of whey protein shakes. To make it easier to blend or mix fruits into whey protein shakes, add liquids first. Depending on your preference, add between one to two cups of one or more of the following:  Fruit juice Banana Peaches Pears Mango Watery fruits, including oranges, pineapple and watermelon Milk, soy milk, almond milk, coconut milk or other low-fat milks Blended ice cubes will thicken and cool your whey protein shake, giving it the consistency of a smoothie or shake. Alternatively, you can freeze bananas, raspberries and other fruits (or buy them frozen) and add them to the drink. You can even make ice cubes out of milk and use these instead. Whey protein shakes may benefit from the addition of ingredients that improve the flavor. Add these ingredients to your liking and you will improve your shake's flavor. Some ingredients to consider adding include:  Honey Vanilla, nutmeg, cinnamon Yogurt Dried fruit, including raisins, apricots and dates Chocolate, vanilla, strawberry or other milkshake powders

Summary:
Use a blender. Choose your flavor of whey protein. Mix in fruits or other ingredients. Add ice cubes. Add flavor-enhancing ingredients.