Hmmm...this is a bit misleading really. The article is not about all jars etc or random jars. It says that rice , which is obviously used to make baby rice, can sometimes have minute levels of arsenic etc in it. As adults this level is fine for us but might not be fine for babies. The emphasis is on a big, big might.
So the message is that we should perhaps stop feeding our babies so much rice , rather than jars per se, just that jars can have baby rice in them. Their main issue is with babies who have high amounts of baby rice several times a day and even then the exposure is minimal and they don't know whether it is an issue. They are just speculating.
But that doesnt sell papers....