Not every one keeps their tobacco in the original Tins or Plastic pouches, many decant into glass/ceramic jars. This allows the tobacco a chance to breathe and introduces air to help maturing. Of course the drawback to this taking the tobacco out with you, leather tobacco pouches allow you to do just that. It also removes those pesky health warnings and often fits into pockets better. The Peterson Deluxe Box Pouch folds over to create a slight seal, thanks to the rubber lining and will hold around 50g of loose pipe tobacco. (Can also be used for rolling tobaccos.)