Hello, I have come across such a sentence in the book that I'm reading and wondering, is coffee grounds synonymous with ground coffee in this context? Because, otherwise it wouldn't make any sense for a WW2 soldier to keep used coffee grounds in his grenade canister I suppose. Anyway I wanted to be sure, thank you for your help. * A half hour later, at 0830, Gordon brewed himself a cup of coffee. He kept coffee grounds in his hand grenade canister, “and I’d melted the snow with my little gas stove, and I’d brewed up this lovely cup of coffee.” * Source: Band of Brothers by Stephen Ambrose.