Our refills have a shelf life of 30 months. However, this is not an expiry date - rather a best before. Our roll on has been thoroughly leak tested at 40°C, so it’s built to handle the heat! Whether it's sitting in your sunny bathroom, coming along in your beach bag, or travelling to a toasty destination, your Roll On is designed to stay sealed, solid and mess-free. That said, it’s always a good idea to: Store it upright when possible (especially in very warm spots), keep the lid screwed on tight when not in use and avoid leaving it in extreme heat (like a closed car on a hot day) just to be extra safe.