@futurebird These things are designed as #TamperProof #appliances to prevent spoiled foods or materials to be accepted.

There are also chemical indicators that'll turn red if ever defrosted [ https://www.foodprocessing.com.au/content/processing/hot-product/nigk-cryomark-cold-shipment-thermal-indicators-207745241 ] or otherwise discolour when going below or above certain temperatures [ https://www.shockwatchuk.com/shop/shockwatch/coldmark-freeze-temperature-indicator-stickers/ ] which is critical for a lot of #food and #medication.