I've been told both, that PETE/PET plastic is fine for brewing, and that 5 gallon water jugs will allow oxygen to slowly leak in. I've got in my possession a 5 gallon water jug marked "For Water Only" with the number 1 recycling symbol (PETE/PET) marked on the bottom. Anyone know if this should be fine for brewing? Also looking for any info to back that up if possible.