These Natural bottles are made of BPA free material (polypropylene).

Innovative 3-in-1 Design:Seamlessly transitions from a bottle to a straw sippy cup, providing a versatile solution for different developmental stages.Interchangeable components include a baby bottle nipple for newborns, a transitional duckbill for infants, and a straight straw for toddlers, offering adaptability as your child grows.

360-Degree Drinking Experience: Unlock a new level of comfort with our sippy cups 360-degree drinking feature, facilitated by the internal rolling gravity ball, allowing your toddler to enjoy their favorite beverages from any angle.This unique design caters to your childs evolving mobility, ensuring they can drink comfortably whether they are sitting, standing, or lying down.

Assemble
The necks of the bottles are wide enough to make the assembling, filling and cleaning easy and quick.