New bottles for Michael just came in. I was so tired of using the thermal. My bottles were not staying warm and milk would spill everywhere. These bottles are strictly for when we go out. Can't wait to use them. They are anti colic nipples. They have three stages baby bottle, sippy cup, and water bottle. Whatever you put in here I use milk will stay warm for 6 hours plus. This is great for us because we use #homemadebabyformula organicKidz#organickidz #thermalbottle #naturalmama #stainlesssteal#stainlessstealbottle #babybottle