Frank Green's 3-in-1 Is the Only Cup You Need

Frank Green’s 3-in-1 Is the Only Cup You Need

I don’t have particularly extreme requirements for a reusable cup. I’m not a hiker. I’m not a camper. I’m not a cyclist. It’s not really a travel mug that I want. I’m not even a coffee connoisseur. But, I do value adaptability—as a fan of both hot and cold coffee—and convenience. For the legion of …

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