Reusable straws help the environment because they help reduce the amount of plastic that ends up in our oceans and landfills. Single-use plastic straws are a major source of pollution, taking hundreds of years to decompose, and often ending up in our waterways. By using reusable straws instead, we can help reduce the environmental damage caused by plastic. Reusable straws also help us save money - instead of buying disposable straws every time we need one, reusable straws can be used again and again for years to come.