Conferences are my main source of certain useful objects: umbrellas, water bottles, insulated coffee mugs, rubiks cubes, and tiny flashlights. At conferences I have also fairly recently won an ipad, fitbit, an echo, and a bendy pirate toy. On the other hand conference swag is also a major category of my clutter: I don't seem to take many t-shirts, but I've picked up far too many pens, notebooks, highlighters, stick-on cell phone wallets, 6-inch rulers, tote bags, and squeezy stress things.