All Vihtavuori reloading powders are packed into bottles and canisters and more in fiberboard boxes. This powder is similar in burn off price to N350, and on some burning amount charts 3N37 is detailed as speedier burning than N350. 3N37 is product of pretty compact granules, when compared to N350, https://flockarms.com/product/vihtavuori-n340-powder-4-lb/