Size: 4.8*1.7cm/1.89*0.67inch, easy to hold. carry, with a small pill to carry; inside.^ High quality; materials: the key ring from the box; drugs is made of aluminum alloy, light and strong. It is non-toxic, does not cause damage or allergies and keeps the pill clean.^ Portable design: The pill holder with key ring is easy to carry. carry, can be hung to the key ring and put in the pocket.^ Waterproof: each key ring from box to drugs is endowed with a seal; made of silicone to make the medicine bottle leak-proof. the air, to humidity and at water.^ Application: The keychain of the water box. drugs suitable for daily use and travel with medication. Patients and the elderly will feel more at ease. comfortable while taking the medication.