The Twistshake anti-colic bottles are perfect for use with regular breastfeeding, and the unique TwistFlow system actively prevents baby colic to ensure an easier transition. These bottles also contain a practical powder container and mixing net to make every feed easier, and cleaning is no issue with the extra wide neck. Prepare your meals ahead of time and carry them in the food container and feel at easy that the mixer net will deliver a clump free, smooth solution each time!