* The AK-47. Love or hate guns, the AK was designed with tolerances that encouraged simultaneously good maintenance patterns and using it as a gorram hammer if the need came to it. * Nalgene bottles. Impact resistant, infinitely screen printable, polycarbonate body, cheap and everything you could want. * The venerable aluminum drinks can: The sheer amount of engineering that has gone into making a bit of aluminum for canning but with the design constraints of pressure and temperature, it's a very neat design. * Fluxx, the game. Fluxx has one rule, the only base rule: Draw a card, play a card. There's no resolution order, no many pages of legalese text like Magic. There is Fluxx.
And that's one of the things that makes Fluxx well designed. I can teach someone how to play Fluxx in 30 seconds: "Draw a card, play a card. When the conditions for winning have been achieved, the game ends." The one thing I don't like about Fluxx is the later addition of Creepers, but those are easily one of the most write-off-able types of cards ever created.