... engineer with 40 years experience and I can tell you that is the worse design I have ever seen. I bought a 3 pack at Costco and i couldn't open any; returned and bough another 3 pack with no success. Then I bought something similar in the local pharmacy and using hammer and knife I was able to open and transfer the liquid.
I would suggest you make a promo "buy one Afrin and get a hammer and knife to open"
It's really frustating.
Carlos Astolpho