Amazon.com: Cornucopia Brands 28-400 Replacement Pumps for ...
To test if your bottle top is 28-400, take the cap off a 2-liter bottle of soda / pop. That is also a 28 mm cap. Test it on your bottle. I understand this also works with a JD cap! TIPS TO OPEN: To open locking pump, grasp bottom under cap with one hand, turn head
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