"a warm drink" is correct and usable in written English.
You can use it when describing something warm that can be consumed. For example, "I would love to have a warm drink on this cold winter day."
Drinking a warm drink works wonders.
The ideal water temperature for the solution is drinking temperature for a warm drink - around 120 to 130 °F (49 to 54 °C).
Participants are asked to bring flashlights, a warm drink and baked goods to share.
The parents of those frolicking children can sit by a bonfire and sip a warm drink.
For those wanting to cut out the coffee dependency but not lose the sensation of a warm drink in the morning, it's a perfect new solution.
These same faces gather here every Tuesday night at the same time for some food, a warm drink, and familiar company.
By savoring small pleasures--such as candlelight or a warm drink--we bring our attention to the things we are fortunate enough to have, but tend to overlook.
On returning to Belstone enjoy a warming drink in this pretty village, first recorded in the Domesday Book".
With a very hospitable pub right next to it, Hatchmere is perfect for an evening dip, followed by a warming drink".
A warming drink on the roof, a two-course meal and glass of fizz are included in the tickets, which cost £45pp.
It was the perfect mix of modern technology and simple pleasures: my little cooker making a warming drink while, at the end of my toes there played a natural panorama that looked like a CGI backdrop.
