If you live in a hot state, such as Arizona, we understand you may be concerned about your product during the delivery process. We assure you that our products are packaged appropriately to arrive to you within your selected shipping time frame and will not be affected by any weather conditions such as extreme heat or cold. However, we do encourage you to coordinate your delivery date If you will be out of town for an extended period of time. Our amber glass bottles are designed specifically to store oils and keep them protected from the sun.