Feel the burn or else you’ll feel the burn! The Cliff Hanger Mug from the Play Coalition makes you really work out those fingertips to hold the mug. Like a rock climbing wall on your coffee cup. Look at this guy:
Yeah baby. Add a little thrill seeking to your daily grind. Don’t drop the mug!
Voted #1 Hand Strengthener: The Finger Master Comes With FREE Instructional Videos And Lifetime Guarantee - For Rock Climbing Hand Strength Training, Guitar & Piano Exercises, Martial Arts Grips, Arthritis Therapy - Fully Adjustable Tension With Copper Core