1.Design patented silbottle reduces colic, vomiting and hiccups 2.Swirler helps disperse the milk power lumps and reduces the possibility of middle ear infection 3.Easy to clean and assemble 4.Eliminates micro biological growth( anti-bacterial) 5.Silicone material is heat resistant up to 200 degreet without any release of bpa(bisphenol-a) 6.Stacking milk power containers store insade bottle for easy carry Contact me