ðiːz wɜːɹ ɪnˈɪʃəli jˈuːzd tə sˈɛl smˈɔːl sˈæmpəlz ʌv tʃˈɑːklət, bˌʌt ðɛɹ ɪmˈiːdɪət pˌɑːpjʊlˈæɹᵻɾi mˈɛnt ðeɪ wɜː sˈuːn jˈuːzd tə sˈɛl ɛntˈaɪɚ bˈɑːɹz.
These were initially used to sell small samples of chocolate, but their immediate popularity meant they were soon used to sell entire bars.