Each single-serve Horizon travel milk box is 8 fl oz and typically provides about 8 g of protein per serving.
Listings show Horizon travel milk in whole (about 3.25% fat), 1% lowfat, and other low‑fat formulations.
The boxed travel milk is ultra‑high temperature (UHT) pasteurized and sealed in shelf‑stable beverage packaging, so it requires no refrigeration and is labeled ready to drink.
Listings commonly highlight calcium and vitamin D per serving. Some flavored low‑fat chocolate boxes also list DHA (about 32 mg) per single serve.
Some listings show a shelf‑stable lactose‑free, no‑added‑sugar 1% low‑fat chocolate option, sold as a 6‑pack of 8 fl oz boxes.