The next thing you'll need is ice cubes. If your IC is sensitive to chemicals in tap water, then filter the water first or use bottled water to make your ice cubes. I usually use pure frozen blueberries. I get mine at Trader Joe's, however they are also available at most supermarkets. When using fresh pears make sure to wash them well to remove any pesticide residue.
Pears are ripe if they yield to slight pressure by a fingertip.
If available, I usually get organic produce. Pears can also be purchased in a can. Most supermarkets have their own brand, and Del Monte has one. Read the label to make sure there are no chemicals in the pears. A ripe honeydew melon has a velvety look and feel to it.