Note that this issue is generally not the cache container itself
I get that. However, this particular story and thread are regarding all the wasted time and money because a bomb squad was called in to remove this suspicious container and the story notes more than one of these removals.
I get the “don’t look suspicious thing. However, when it comes to calling in a bomb squad, I would imagine that if you make a PVC pipe cache container it is much more likely the bomb squad will be called then if you were to hide a magnetic nano (that the suspicious muggle probably wont even be able to find!). That was the nature of my commentary.
