Oral care leader Colgate is rolling out a new manual toothbrush with a replaceable head that will result in 80% less plastic waste and stem the tide of discarded brushes ending up in landfill.   More than 495 million adult manual toothbrushes were purchased in the US. in 2020 and will likely end up in landfill because they cannot be easily recycled, said Colgate. The new brush, named Colgate Keep, has a snap-on replaceable brush head and a reusable aluminum handle to inspire people to make ...