Hi, For the best nutrition and texture, we recommend that you use frozen fruits such as berries or bananas or mango to make your NutriBullet cold. If you do use ice, do not exceed more than 25% of your total ingredients. We suggest smaller cubes or crushed such as those from your refrigerator ice maker so that it disperses thoroughly in the NutriBlast. Always use liquid when extracting NutriBlasts. Also chilled liquid such as spring water, herbal or ginger teas, almond milk, etc to the Max line help to make it cold without over watering.