I recently bought a 500ml barber sized tube of Proraso green shaving cream & a 500 ml jar of the green pre/post shaving cream. I am having second thoughts as a Proraso rep told me that the bag of shaving cream may start to lose it’s consistency & texture before I finish it. However he stated it should not spoil or develop bacteria as long as I keep oxygen & water out of the bag. I was thinking if putting some in a 100ml travel shampoo squeeze / flip top bottle to limit how much I open the bag. Has anyone else ever used one of these bags or have any opinions they would like to share?