Did you know that CooperVision MyDay one-day contact lenses are plastic neutral! How it works. • All plastic used in the MyDay contact lens family, the blister and the secondary packaging (outer carton) is added up. • CooperVision purchases credits equal to the weight of plastic used in the MyDay contact lenses, the blister and the secondary packaging here in South Africa. • An equal amount of ocean-bound plastic is collected by Plastic Bank®.