Roof Coffee Cup

Step 4 Arranging your magnets.

I use magnets salvaged from hard drives for my cups because they are free to me, and very powerful.  Once removed from the drives and their mounts, you simply need to find a configuration that works for you.  The magnets are powerful, so they will try to fly towards each other, so watch your hands.  If you lay them flat, you can usually find a shape they rest well in.  This cup seemed to work with the magnets going around in a circle.  The original RoofCoffeeCup worked better with one magnet facing the opposite way of the others.  It's the second photo in this step.  Just for a reference, that cup with magnets weighs just under 3oz, but can lift and hold a 10lb dumbbell. 

Comments

[RedSnertz]

Best way to separate the magnets from the backing:

http://www.instructables.com/id/How-to-separate-the-Magnets-from-an-old-harddisk/

[MrHonda300]

strong magnets to hold 10 lbs.