While many companies are moving away from using blister packaging, there are still times you may need to crack things open. When scissors don’t work out, just grab a can opener and open away. On a related note, did you know that while food preservation using tin cans had been practiced since at least 1772 in the Netherlands, the first can openers were not patented until 1855 in England and 1858 in the United States? These vintage openers were basically variations of a knife. Continue reading for more.