If I didn't have the original package I wouldn't keep them. I would get rid of them.
To put it simply: the risk is not worth the benefit.
"Socialized Medicine is the Keystone to the Arch of the Socialist State.” -Vladimir Lenin
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them." - Thomas Jefferson (An early warning to Obama care)