K-Cups, the little single-serve plastic coffee pods that populate break rooms worldwide, helped their parent company Keurig Green Mountain bring in $4.7 billion last year, but the man who created them says he regrets their existence. Keurig co-founder John Sylvan recently told The Atlantic that he doesn't own a Keurig K-Cup brewer. “It's like a cigarette for coffee, a single-serve delivery mechanism for an addictive substance,” he explained. While the K-Cups are massively popular (and since the patent expired in 2012, all manner of beverage companies have been using the tech and design), the environmental footprint leaves something to be desired, as they are neither recyclable nor biodegradable -- and therein lies Sylvan's issue. Sylvan left Keurig in the late '90s, and is now at the helm of a solar panel company called Zonbak.