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How to stop using plastic
Use reusable water bottles instead of plastic bottles.
Get a tumbler, mason jar, or a bottle and use those to put your smoothies and other drinks in instead of new plastic containers every time. Some places even offer a discount if you do this.
Plastic water bottles are one of the best examples of how simple changes can create a big impact in your life. Not only is the water being sold not regulated as strictly as municipal drinking water sources, but the plastic mostly ends up in landfills.