Elizabeth,
Two options for you to donate these:
https://forum.tudiabetes.org/topics/how-to-donate-unused-insulin
http://www.tudiabetes.org/xn/detail/583967:Comment:1676484 (Chuck, the founder of this organization, is a member of TuDiabetes: http://www.tudiabetes.org/profile/CHUCK778)
Hope this helps!