A thermos coffee carafe or crock pot, as an OP suggested, would work very well. If you use a thermos, fill it with hot water and let it sit a few minutes first – the pre-heating will help it keep your hot choc hotter longer.Click to see full answer. Besides, how long can you keep hot chocolate? about 3 to 5 days Similarly, can you keep hot chocolate warm in a coffee urn? Can I make hot chocolate in a coffee urn using hot chocolate mix and water? Yes, but there are a few tricks to it: Put in the water only until the perk cycle is finished and the light comes on, then stir is the powder. The perk cycle is too hot, the hold temp is OK. Consequently, how do you store hot chocolate? Keep hot cocoa in crock pot and cover with lid between serving. If cocoa gets too cool, set to warm for 20 minutes. Hot cocoa should only remain out a maximum of 2 hours before being packed up and stored in the refrigerator. Once refrigerated, hot cocoa can be stored for up to 4 days.How do you keep drinks warm outside? How To Keep Your Coffee Hot, Even If It’s The Dead Of Winter App-Enabled Digital Mug. Mug Warmer. Wrap It In A Scarf. Immersion Heater. Knit A Cup Sleeve. Drink From A Styrofoam Cup.