One of the best tasting and most economical ready-to-drink (RTD) protein shakes is also one of the best in terms of nutritional content. Almost unbelievably, each can of Worldwide Sports Ultra Pure Protein Shake packs as much protein as a 6 egg omlette, but at an ultra-skinny 170 calories and with less than 5% of the cholesterol in a just one egg. Chill Ultra Pure Protein shakes for best taste right from the can.