Yes significantly so. Compare buying bulk coffee and brewing a large carafe like Sylvan says, to K-Cups. First it's more expensive for you. Second you have unrecyclable plastic waste. Third what could once be composted now gets thrown into anaerobic landfill.

And people are up in arms about water bottles. This is just another ridiculous capitalist scheme that trades marginal convenience against our planet's future. It's no a significant source of pollution by itself but ingrains a culture of disposability that has created most of the pollution on earth.