Giá Ly Stein MGT Cho Ray Nam Châm

Uses 10mmx3mm disc magnets. Has space for 5 magnets. You can get away with using fewer than 5

Inner diameter is roughly 102mm. Enough give for a 24oz Stanley stein that putting into holder is easy, but walls are still tall enough to resist tipping over. 

I'm currently using these as-is, but time will tell if walls need to be made higher or disc magnets need to be replaced with screw-in option