Unlike glass bottles, There’s no way to clean plastic bottles thoroughly enough to be safely reused as food containers (in a commercial sense; you can wash and reuse plastic for personal re-use a few times before it gets too gross) without destroying them. Even when you recycle them they are mostly recycled into something a ‘step down’ like car parts, and rarely become bottles again. Glass bottles can be fully recycled and since the process involves melting the bottles it’s possible to make the end product food-safe sanitary again.
However, even glass bottles don’t frequently get reused because the logistics of getting a bottle back to the distributor would require a whole team of people to support the collection, cleanup, and transport of the bottles. Human labor costs scale poorly compared to new materials costs so most companies choose to just use new bottles instead of trying to reclaim old ones
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