What's Your Most Disappointing Amazon Purchase?

Amazon is such an enabler; that site has everything, right there in front of your face. But sometimes what arrives is not what you thought you were buying. What's your most disappointing Amazon purchase?

Amazon has a charming way of making a crap-ton of neon temporary face tattoos or a bulk order of 60 watt lightbulbs seem reasonable, because they're just sitting there on your screen, almost beckoning you to Buy With One Click™. We've all been there. So what have you ordered that didn't arrive as (you thought) it was advertised?