Nitrous Oxide (N2O) Whipped Cream Chargers From Starbucks.

Originally Posted by johnnybeegoods

I think these are co2 cartridges used to use them in a pellet gun I had as a kid.

I thought they were CO2 cartridges also but, They are N2O canisters. They are mostly flavored cream with a small amount of nitrous oxide inside. These were manufactured in Austria.