Standard neck feeding bottle handle / staw made by PPSU, a food contact material. This material has the characteristics of impact resistance, high temperature resistance and stable property. Best anti leak suction facilitating mechanism weight straw; allows smooth flow of milk only when sucked. Wide caliber bottle mouth is convenient to make milk by milk powder and cleaning bottle. The curve of bottle is smooth, mellow and comfortable feel. How to use: After use always wash and sterilize the bottles to keep the bacteria away. Hand-wash the new bottles with soap and lukewarm water. Caution & Warnings: Store the clean and dry bottles in a cool and moisture-free place Replace the teats periodically Store the bottle away from direct sunlight Never leave a child unattended while feeding. Ingredients: Made from food grade silicone - safe, durable and elastic, BPA Free.