Features of the Hydro Flask Kids' 20oz Wide Mouth Flex Straw and Boot TempShield double wall vacuum Insulation 18/8 Pro-grade stainless steel Leak proof Easy grip lid BPA-Free Color last powder coat Straw cap makes cold refreshment for little ones that much easier Easy to transport; comfortable to carry Reliably sip and transport your kids bottle without worry Added bottle protection and traction on slippery surfaces