Freezer: If you're looking for long term storage, the freezer is not a bad option. However, you will have to wait for it to thaw out properly before you use it. Refrigerator: If you're looking to store it in the short-term, you can leave it in the fridge. This is a good option to make sure there isn't frequent temperature changes. Temperature Fluctuations As you know, we usually open and close freezers and refrigerators frequently, which may change the appliance's temperature, leading to condensation inside the bottles. This condensation can introduce water into the vape juice, diluting it and affecting its flavor. So try it to store it in the back of your fridge. Freezing And Thawing Vape juice contains a propylene glycol (PG) and vegetable glycerin (VG) mixture with different freezing points. Furthermore, when you freeze this mixture at a certain freezing point, it can cause the separation of vape juice ingredients and alter the consistency, potentially impacting the flavor when it's melted.