The bébémarc PPSU Transition Feeding Bottle is highly durable, with heat resistance up to 180 degrees. It features clear volumetric markings for easy monitoring of milk levels without unlatching, ensuring convenience during feeding. The bottle comes with an antibacterial natural feeding nipple, which repels up to 99% of harmful bacteria. The nipple is soft, providing a comforting, breast-like feel that helps prevent nipple confusion, making the transition between breast and bottle feeding smooth and comfortable for the baby.