What happens when you freeze water in a plastic container?

Plastic soft drink containers can be used to freeze water, but you might not want to. Because reused soft drink containers can lead to germs.

But if you want to just follow these steps. Fill them with drink & use them as freezer packs in chilly bins

Since water expands when frozen, be sure not to fill your container all the way to the top or you risk cracking your container.

Some people are concerned that plasticisers (like bisphenol A, or BPA used to make the plastic supple and not brittle could leach into the contents of a reused container. Physically this is a possibility but the amounts involved are extremely small, and even smaller when dealing with cold, rather than hot, contents. The scientific community has not agreed on this question.

To reduce their potential for exposure, consumers who are concerned can rinse empty bottles with hot water before adding cold contents for storage, and reuse bottles only a few times.

Answer 2: Our warm mouths are a haven for bacteria and has been called an oral ecosystem. It is a haven for bacteria, some good, some bad. Its best to toss used water bottles. Invest in some other container if you want frozen water. There are numerous containers for just that purpose.