A local business opened a new branch about a week ago, and my husband and I went by to have a look. They were giving away semi-hard clear plastic waterbottles that were free and since we both drink a lot of water and like to have it on hand we snagged a couple. Today I was trying to get the smell of some green jasmine that I had put in mine out of it by adding hot water...big mistake. The water was not even boiling and the bottle just crumpled, literally melted from the hot water.
Yikes! So don't use water bottles to brew tea in if it requires hot water is what I would recommend. At least check them with warm water and see if they soften first.
Melinda