I want to use one aluminum bottle, rather than several plastic ones. And this may sound stupid, but will an aluminum water bottle be safe to put in the fridge?Carefull with using Aluminum to store water you are going to drink. I would use a ceramic or glass container instead. Aluminum is recognized as a NEUROTOXIN. It has no biological function in the metabolisms of human beings. It can bio accumulate in the body and competes with calcium for absorption in the body. There is growing scientific evidence that links increase intakes of aluminum with Alzheimer disease and other brain degenerative disorders. (High levels of Aluminum have been found in the brains of deceased Alzheimers patients, and Aluminum can pass the blood brain barrier) In my sources I have some links to scholarly articles on this matter and the Wikipedia article on Aluminum Please do more research into this matter you will uncover more Good LuckWater Bottle FridgeYes, aluminum can go in the fridge. However, it has been linked to several brain disorders, to include Alzheimers. I recommend a stainless, or glass bottle for reuse. I have purchase drinks in a glass container, then reused the empty bottle for my water. Glass is a safe alternative to aluminum, and easy to keep clean! Continue to stay away from plastic, even if it is marked BPA free. Bisphenol-A (BPA) are common in plastics and continued studies declare BPA a health risk. My vote is for glass - it has stood the test of time!yea it would be safe because my brother does it all the time. Also you can just refill your plastic bottles with water and put in the fridge and the freezer because I do that all the time and i\'m still using the same water bottles and they are in great shape and the fridge and freezer keep my water nice in cold.Just about anything is safe in the fridge. I put aluminum Coke cans in the fridge.Other related question