One Danish brewery called Noerrebro Bryghus collected over 13,000 gallons of human urine and used it as part of the process to make their flagship beer, a brew which is aptly called the 'Pisner'. The urine, which was collected from people who went to Roskilde Festival in 2015, is not used as a direct ingredient in the Pisner itself, but is sprayed on the land growing the necessary beer ingredients. The urine fertiliser was used on 11 tonnes of malting barley.