I own a small chocolate shop in Jumeirah and we import couverture chocolate and other temperature sensitive ingredients from Europe every few months. The shipping company does their part with refrigerated containers but once the pallets arrive at our shop and we break them down for storage, that's where things get messy. Currently using basic plastic containers from a local supplier but they develop tiny cracks after being moved between the walk in freezer and room temperature repeatedly, and last shipment I lost about three kilos of white chocolate that absorbed freezer odors because the lid didn't seal properly. I need something much more robust and found what appears to be a Reliable Closed Crate supplier in UAE when searching for industrial food grade options, the Crateco closed crates seem to be designed for exactly this kind of repeated cold chain use. Before I place an order I'm trying to figure out if the plastic they use is rated for negative temperatures without becoming brittle, our freezer runs at minus eighteen and some plastics just can't handle that long term regardless of what the marketing says. Also important to know if the seals hold up to condensation, because every time we pull a crate out of the freezer into the warm kitchen it sweats like crazy and I don't want moisture working its way inside past the lid seal and causing ice crystal formation on the chocolate. Anyone in frozen food or similar cold storage using these daily?