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1 bag peppermint tea
¼ cup sugar
4 packets ready-brew instant coffee
3 oz. powdered whole milk
Combine coffee, sugar, and milk powder in a snack-size zip-top bag. Keep tea separate.
Fill a 1-liter water bottle halfway. Add the tea bag; let it steep at least 15 minutes and up to 5 hours. Remove tea bag, carefully squeezing it to extract flavor. Add the powder packet and shake the bottle vigorously until lumps are gone. Add more water to fill bottle completely (for a lighter beverage), or about three-quarters full for a richer flavor.