Can metal drink bottles go in the fridge?

In this brief text we will provide the answer to the question: “Can metal drink bottles go in the fridge?”. In addition, we will explain how metal thermos water bottles keep water cold and if it is bad to drink water from metal or aluminum bottles.

Can metal drink bottles go in the fridge?

Yes, you can put metal bottles in the fridge without any problem. However, be careful when placing aluminum or metal bottles in the freezer, as if you overfill the bottle it may burst due to the water’s ability to expand when frozen.

In addition, stainless steel bottles do not lose their characteristics and functionality over time. They have an indefinite expiry date. To prevent the functionality from being compromised and to preserve its original characteristics for longer, special care is required with the product.

External factors such as fall, strong pressure, impact, washing in a dishwasher and freezer or refrigerator can influence the loss of vacuum in the bottle, responsible for maintaining the temperature of the cold or hot beverage.

Products that kept the temperature and with time stopped keeping it due to some external factor are not considered products with manufacturing defects.

Can you refrigerate stainless steel water bottles?

It is not recommended to refrigerate stainless steel water bottles, as if you put a stainless steel water bottle in a freezer, you can accidentally and even damage the vacuum seal, causing it to lose its insulating properties and not keep your water cold. for so long.

Likewise, placing a thermos flask in a refrigerator will increase the time, increase the adiabatic properties if you are storing things cold, and make them worse if you store hot liquids. If you’re not storing anything yet, you can “pre-cool” without the lid and extend the temperature of the cold drink.

Is it bad to drink out of a stainless steel water bottle?

It’s okay to drink water from a bottle made of stainless steel. Stainless steel composite water bottles are considered safe as they do not cause chemicals to leach out; however some have a plastic tube, so it is important to make sure that this material is BPA free.

Some aluminum bottles contain a coating of sorts, but manufacturers claim it prevents toxins from penetrating the drink. One of the most popular manufacturers of this type of product includes an internal finish in the production of its containers, but guarantees that it is made of a material approved by Organs competent bodies and that it also protects users from a potential risk.

How do metal thermos water bottles keep water cold?

To understand the functioning of the thermos bottle we must understand that the walls of the bottle must not allow the passage of heat through them by any type of existing energy propagation processes, that is, the energy it cannot dissipate by conduction, convection or radiation.

Thermos bottles are formed by a glass vase with double walls, with a distance of approximately one centimeter. When they are manufactured, most of the air is removed, as it is impossible to obtain a full vacuum. With this process the heat transfer is greatly reduced, both by conduction and by convection.

To be able to keep the contents placed in a thermos, whether hot or cold, there is a physical process, theoretically very simple. The thermos bottle has a double-walled glass ampoule, with mirrors on the inside, with a space between them practically empty.

Mirrored walls serve to reflect radiation, and thus, prevent it from propagating. In the case of hot liquids, the reflection happens from the inside to the outside of the container; or from the outside in, in the case of cold liquids. 

The existing void space is to make it difficult for the heat to propagate through the bottle’s contact with the region around it. In this way the entrance or exit of heat practically does not happen. Because there are mirrored walls in the thermos, great care must be taken to avoid falling. 

Therefore, if the thermos is dropped, the mirror ampoule can break, even with the outer protection, which is generally made of plastic.

In this case, with the breakage of the mirrors, the space between the walls will no longer be empty, air will enter and thus, it will no longer be possible to retain heat. The temperature inside the bottle can be maintained for a few hours. The system does not work 100%. After some time, thermal equilibrium with the environment is inevitable.


In this brief text we provided the answer to the question: “Can metal drink bottles go in the fridge?”. In addition, we explained how metal thermos water bottles keep water cold and if it is bad to drink water from metal or aluminum bottles.


Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.