0.47 fl oz unopened OBAGI ELASTIderm eye serum. This stuff is fantastic, all time favorite eye serum! Use morning and night. Application is easy as it is roll on! Description: ELASTIderm Eye Serum refreshes the appearance of the delicate skin around eyes with clinically proven ingredients, including caffeine, to reduce the appearance of under-eye puffiness. Ophthalmologist tested.