Outer brushed stainless steel, inner food safe plastic parts
6-PACK 28mm- You get six tops with precut dip tubes that fit 16oz and most 8oz Boston round bottles
: Fits bottles where mouth of bottle measures 28mm from outer edge to outer edge such as 8oz or 16oz boston round bottles; dip tube length 6.25 in. & can be cut to any shorter length; see info. in description on verifying size--IMPT - PLEASE CHECK THAT SIZE FIT
Great for add-ons to bottles you don’t have pumps for or upgrades or replacements for old pump tops
*** IMPORTANT HACK: How can you tell if it will fit? This is the "SAME" size as a 2-liter pop bottle cap.