13 items in this article 1 item on sale! Photo-Illustration: The Strategist; Photo: Getty Images, Joe McKendry If you’re like us, you’ve probably wondered what everyday stuff famous people add to their carts — like hair spray or an electric toothbrush . We asked actor Mark Duplass — whose new movie, Magic Hour , premieres today — about the e-reader , backpack , and cheap sunglasses he can’t live without. (No. 1 on his list, though this we can’t link to, is his wife, Katie. “We are pretty co-