The BLACK+BLUM Explorer Flask Duo is built to withstand rugged outdoor excursions, featuring a heavy-duty 1-litre vacuum-insulated core that maintains your beverage temperature for a full 24 hours. This setup includes two double-walled stainless steel cups that thread tightly onto the top and bottom, making it easy to share a hot coffee or cold water with a companion. A thick nylon strap provides a reliable grip for carrying, while the steel lid and silicone seal ensure a completely leakproof experience in your pack. The BLACK+BLUM Explorer Flask Duo offers a durable and highly efficient way to stay hydrated in any environment.