Packaging can't change perceptions, it can build one
I can't think of brands where consumers have changed already formed perceptions about it, just because there was a change in packaging. Perceptions are changed only if the brand as a whole can work on a new identity. That includes change in packaging in addition to changes to the other identifiable characteristics of the brand.
ET reports that, 'smaller manufacturing companies, that include private labels, have taken to innovative packaging to hit their target consumers. Dadima’s Magic mango pickle, ITS fruit tomato ketchup, Mehek Dehradoon Basmati, 24 Letter Mantra and Bread & More are some of the products available in shops with good packaging motifs.'
The efforts that these companies are putting in to get their packaging to be part of the stimuli that drives perceptions, is not misplaced. Especially since purchase decisions on most low involvement goods are undertaken inside a store when the consumer faces the brand on a store shelf. And at that 'moment of truth', packaging surely helps.