Can I serve cold drinks in double paper cups? Will it condense?

double paper cups can hold cold drinks for what?

Double wall paper cups can hold cold drinks just like wearing a 'heat insulation jacket' for drinks. Taking 8oz double wall paper cup as an example, when the ice water poured into the cup, the cup of low temperature will try to absorb the outside world heat, but 8oz double wall paper cup of the two layers of paper between the air sandwich is a 'heat insulator' - the air's thermal conductivity is much worse than the paper, like a wall to block the heat. like a wall blocking the 'sneak attack' of heat. This layer of air separates cold drinks from the outside world, so that the ice melts slower, buy iced coffee in the summer with a double-layer cup, half an hour later to drink it is still cool, this is the reason.

dew phenomenon: why single-layer cup will 'sweat'?

First understand a concept: dew point. Like the winter window glass will fog up when cold, the water vapour in the air will become water droplets when it encounters objects with a lower temperature than the 'dew point'. Single-layer paper cups filled with ice water, the walls of the cup directly by the cold drink 'frozen through', the temperature of the outer wall quickly dropped below the dew point, around the water vapour will condense into water droplets on the wall of the cup, held in the hand wet, but also may wet the bag or desktop.

double wall cup how to crack the 'sweat' difficult problem?

The cleverness of the 8oz double wall paper cup lies in the 'compartmentalised design': the inner layer of contact with cold drinks, the outer layer away from the source of low temperature, the middle of the air sandwich like a 'thermal wall', to prevent the cold from being transmitted to the outer layer of the paper wall. In this way, the temperature of the outer paper wall of the 8oz double wall paper cup is much higher than that of the inner layer, and it is not easy to drop below the dew point, so naturally there will not be a lot of condensation. Measurements show that the same ice water, single-wall cup outer wall of 5 minutes hanging water droplets, double-wall cup outer wall after 1 hour is still dry, hold in the hand will not be slippery, and do not have to worry about wetting the document.