Many cities across the States have started to ban plastic straws. In a lot of places on the West Coast, restaurants and bars do not serve drinks with plastic stirs or straws, and soon we will see this happen across the East Coast as well.
In general, plastic straws are wasteful garbage. And therefore people are searching for alternatives. Paper straws get soggy and wet, metal straws distort the taste of the drink, and therefore silicone straws are becoming more and more popular.