By the way, you should keep several of these for your kit(s), home, car, work, etc.
Stainless Steel Bottles
Stainless steel water bottles are the best choice when it comes to reusable water bottles.
Stainless steel is a very durable material and is difficult to break.
Water can be boiled for purification directly in the bottle — on a burner, hanging over a fire, sitting in hot coals, etc.
Some say the water tastes better coming from a stainless steel bottle.
Water tends to stay cold for longer periods of time in a stainless steel bottle.
Stainless steel will not alter the way your water (or whatever) tastes.
Aluminum Water Bottles
Aluminum water bottles are another alternative for reusable water bottles.
Similar to stainless steel, aluminum keeps the water cold longer, you can boil water in them, and it is a robust material that is not likely to break easily.
If you are concerned about BPA, most aluminum bottles are BPA free. Read the fine print though…
Aluminum bottles are safer than plastic in this regard (likelihood of BPA), but there are also questions regarding the long term effects of aluminum’s effect on the body.
BPA-Free Plastic Bottles
BPA stands for Bisphenol A, which is a compound used to make plastics and resins. Deemed toxic, BPA is no longer being used by well-known water manufacturers.
Hard plastics almost always contain BPA, and any plastic marked with a #3 or #6 recycling symbol contains the chemical.
Bottles marked with a #7 may or may not contain BPA. (#7 is a “catch all” that includes products mixing non-BPA plastics together.)
Recycling codes #2, #4, and #5 are generally deemed to be safe plastic and have a minimal “leach” effect.
The rate at which plastic deteriorates, even in safe plastic, increases over time. Practice the first-in, first-out rotation. The longer it lingers in storage, the more chemicals are potentially leached out.