It's a good promotional item for milk powder and pregnancy business. Just rotate two plastic round sheets, a pregnant woman can know when should go to subsequent visit and pay attention to the estimated date of childbirth or delivery.

Material : PVC, PP, PS.
Size : 15cm x 12cm ,12cm x 9cm.
The size also can be custom-made.
Thickness : 0.5 ~ 1mm
Printing : 4c printing or screen printing