I have a coffee maker (grounds in filter-lined basket on top), old-fashioned percolator, and a French press. Since I don't drink coffee I leave it up to guests to choose how to make their brew (using ground coffee stored in the freezer). It's interesting to see the choices - people are apparently set in their ways at home but will experiment elsewhere.

My bugaboo is the hot drink travel mug. Plastic vs steel, closable top vs open sipping slot. It changes the taste of the tea simply by being transferred to the portable container, so I have to really want that tea to drink it cooler and with an altered taste.

Sods' law would have to do with how likely am I to dribble tea on myself in the car. The more dressed up I am and the more important the occasion, the more likely the drip.