I use colbalt blue 4 oz bottles. Amber bottles are just as good, or better. I use smaller bottles because I don't like too much open at one time.
Edit: It's also a good idea to sanitize your bottles before storage.
Edit: It's also a good idea to sanitize your bottles before storage.
Responded to your PM.
For longer term storage: Put your nic in a glass bottle first, filled very near to the top, and stick it in the freezer. When you remove it from the freezer, I suggest allowing it to come to room temperature before opening (to reduce water absorption).
