On some of the newborn swaddler diapers we have noticed an indicator stripe that is yellow and turns blue when the diaper needs to be changed. This past weekend we bought a pack of diapers that did not have the stripes on the diapers (but the packaging seemed to look the same). My question is...does anyone know how to determine from the outside of the package which packages contain diapers with stripes and which do not? We really like having the indicator stripes on the diapers! TIA for the help!