In Israel there are thousands of explosion containers, but they are just holes in the ground, roughly one foot deep, lined with some metallic or plastic sheet. The Hebrew name is "bor bitahon" (you'd pronounce it "Bawr Bee-tuh-HONE") literally "security hole". The logic would be that the good Earth will do the job of containing a significant proportion of the impact, with people feeling just a tremor. (A Chinese metal box could be blown to dangerous flying smithereens if the explosion is loud enough.) The Israeli version is also cheaper if you must deploy it everywhere, including schools, malls, streets, parks, etc.Probably the other important difference is that Israel has a serious bomb threat to worry about and so can't just fool around with "security theater."
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