I am delving into the world of baby gear research again and very intrigued with stainless steel baby bottles! I was considering switching to glass (used Tommee Tippee with DD) but then I saw OrganicKidz and Kleen Kanteen both make stainless steel bottles with a wide-based nipple. I chose the Tommee Tippee with DD to more closely mimic BFing and wanted to choose another with a wide nipple. The OrganicKidz has a very interesting designed nipple that I think I would like but... has anyone had any experience with these bottles? Pros? Cons?