The samples from Smoke Rainbow come in little pots with a label telling you the brand, flavour, PG/VG ratio, and a warning not to drink it. For postage they push them into a polystyrene block which is also ideal for storage. They sent me 2 free pipettes, as the pots are not suitable for decanting directly into a clearo.
The only downside is the pots do not look like they are resealable. You'd probably be able to close it for storage upright, but I don't think it would seal. That's probably not an issue for most people given they are only 1ml though.