... 0.5mm thickness 304 stainless steel -none-leaching -non-toxic -100% BPA free Specfication:The lids are made from stainless steel and/or polypropylene # ... 5 plastic. All bottles and lids are non-leaching, non-toxic and 100% BPA free! ... available, including easy-sip toddler spouts, sports lids, stainless steel screw caps and even an adaptor for fitting baby teats ...