Whippiphany N2O Filter - Purifies Nitrous OxideWhippiphany N2O Filter Copper Core 1 Micron Purifier for Whipped Cream Chargers and Wine Preservation The Whippiphany N2O Filter is a copper core purification cartridge that removes machine oils, metal shavings, and particulate down to 1 micron before the gas reaches your food or wine. It threads onto every standard 8g cream charger holder and onto our regulator for tank use, so the same filter works for whipped cream dispensers, espuma, nitro coffee,