Functionality, beauty, and safety are core values of Hevea. The innovative design of their unique rubber covering, serves to protect the glass bottle from breakage if dropped by bouncing and cushioning the impact. The unique pure rubber cover is soft, flexible and easy to grasp, helping little hands hold the bottle easily, especially if the bottle becomes slippery. When the rubber cover is not being used in this way, it is a fun, bouncy ball, which is safe to chew on. The bottle comes with an anti-colic, slow flow natural rubber nipple which is softer than silicone and very resistant to teething and bites, a screw thread and cap. Additional natural rubber nipples of slow flow and medium flow can be bought separately.