Bear Necessities

It must be the silly season, as lots of UK newspapers have led on an apparent trashing by bears of a Norwegian holiday hut that was stocked with 100 cans of lager, chocolate, honey and marshmallows (http://www.dailymail.co.uk/news/article-2186993/Boozy-beer-bears-Family-bears-break-cabin-Norway-finish-100-cans-lager.html). The culprits are said to be a mother bear with 3 cubs and, certainly, bears are opportunistic feeders particularily on the described food items. I do wonder, however, how efficient the bears were at opening the lager cans. Might, possibly be some human intervention?