"Rotary movement is one of the skills to be retained the longest" (MRC)
Knurled transparent top rotates in one direction
For the blind or partially sighted, the ribbed compartments indicate dosage times, an audible click can be heard and "movement" can be felt when rotated.
Non slip material available to ease rotation for users with a weak grip
Compartments numbered 1 - 4 22.85 x 8.90 x 8.90cm (9" x 3" x 3") 7.62cm(3")diameter