A label and methods and devices for detecting an environmental factor that exceeds a threshold are described. The label includes a plurality of codable areas. The first portion of the plurality of codable areas are coded according to a first value and the second portion of the plurality of codable areas are coded according to a second value. The label additionally includes an environmentally triggered bubble positioned in one of the plurality of codable areas. The environmentally triggered bubble changes between the first value and the second value when ruptured. As a result, the code that the label represents changes when the environmentally triggered bubble ruptures.