My brother in law is a chemist at a major pharmaceutical company. At one point he was tasked with spot testing IV saline solutions. This led to him having hundreds of extra bags (he would test one out of pallet, but they would not resell the remainder of the box).
The extras he gave to anyone who used contact lenses as it was a substitute for saline. When I asked about expiration dates he said there were only there out of an abundance of legal caution. I was possible but unlikely that the container would break down if there was a problem in its manufacturing. He expected that the container lifespan was probably 5 to 10 times longer than indicated.
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