Here are some ideas. lol!
Breast Milk Memorabilia - mom.me
O wow..... Tho the Popsicle may be good for teething...
There are also milk banks around that take extra milk for preemies and such. I think some hospitals have milk banks too.
Kennedy - b. 01.26.10 after 15 cycles of TTC
Marshall - b. 06.17.13 after 3 cycles of TTC