A combination temperature exposure indicator suitable for attachment to,
or association with, a host product has a substrate, a freeze indicator
supported by the substrate and a cumulative ambient time-temperature
indicator also supported by the substrate. The freeze indicator can
provide a visual indication of exposure of the freeze indicator to a
freezing or near-freezing temperature and the cumulative time-temperature
indicator can provide a visual indication of exposure of the cumulative
time-temperature indicator to a predetermined cumulative time-temperature
value. Also disclosed are: a combination freeze indicator and threshold
temperature indicator; a combination threshold indicator and cumulative
temperature indicator; and three-way combination indicators that can
provide indications of cumulative past temperature exposure, exposure to
freezing temperatures and exposure to a temperature above a threshold.