Sleek design meets superior, unbreakable construction in our toughest flask yet. It’s engineered with cold-rolled steel and finished in the perfect Foundry black powdercoat. The ergonomic shape also slides easily in your hip pocket for anywhere adventuring. Internal threads on the cap make for smoother sipping or swigging, and the wide mouth allows for easy refills.
HOW TO DEEP-CLEAN YOUR MASTER FLASK:
- ¼ cup uncooked rice
- 3oz distilled white vinegar
- Pour ¼ cup of uncooked rice into flask.
- Fill flask with 3oz of distilled white vinegar
- Seal flask.
- Shake vigorously for 1 minute.
- Let sit for 5-10 minutes. *
- Shake vigorously again for 1-2 minutes.
- Empty flask. Bonus points for composting the rice.
- Rinse thoroughly with warm water.
- Leave open until dry.
*Do not soak for extended period of time. A vinegar soak will eventually corrode Stainless Steel.