9. Bottled water
Bottled water is a bad buy for several reasons. First of all, it is very expensive compared to your tap water, and not necessarily of better quality, either. Many bottlers get their water from the same municipal source as serves your home.
Bottled water is also an environmental disaster – making and shipping all those bottles consumes a lot of fossil fuel, and many tons of the discarded plastic ends up in landfills and oceans every year.
Even with the cost of at-home water filters, you will come out ahead financially if you fill a reusable bottle, and you’ll do the environment a favor as well.