What makes a desktop tape dispenser actually stay put?

A weighted internal core plus a non-skid rubber or foam base is what reviewers and specialist subreddits like r/eBaySellers consistently cite as the difference between one-handed dispensing and chasing the dispenser across the desk. Models marketed as 'weighted' or 'heavy duty' generally hit roughly 1 to 1.5 pounds, which is enough to resist a normal pull.