A reusable pi\xf1ata system having a hollow body with an open bottom end. The medication delivery system includes a barrel, a plunger assembly, a dosage selection device, and a force producing element. The uneven structure is disposed in plurality on the substrate, and a pitch of the uneven structure is within a range of 30 nm or more and 500 nm or less and a depth of the uneven structure is within a range of 100 nm or more. The supporting arms are rearwardly or frontwardly and spacedly extended from the magnetic auxiliary frame to substantially align with the magnetic seats respectively, wherein each of the supporting arms comprises a magnetic member magnetically attract with the respective magnetic seat to detachably mount the magnetic auxiliary frame in front or back of the primary spectacles frame. Actuation of the motor causes the fan and the bubble generator to be simultaneously actuated.