The somewhat indestructible Hario V60. A classic tool in the hand brewing game and one of our favourite ways to make coffee on the daily here in the roastery. Plastic means less chance you will smash it while you haven't quite woken up yet and also really helps by keeping the heat (from the hot water) in the coffee!
They call this their 2 Cup model but we tend to use it for 15g-20g brews. It can definitely do bigger or smaller depending how you like to roll.
Note, papers are sold separately so make sure to buy those here also if you don't have any yet.