I stored my breast milk for about 6 weeks in the freezer. It smells weird (i dare not taste it) but my baby took it with no issues at all.
I used breast milk storage bags or milk bottles (if i had extra on hand). If you use glass, you better constantly check for cracks! Sounds a wee bit fragile and breakable to me (then again, things break easily in my hands).
The older generation seems to always have issues with regards to breastfeeding and storing of breast milk. If you're a staunch believer in giving your baby breast milk, dont't get swayed by the remarks of others. Because they'll be many (especially older people) telling you negative things.