So what makes the Master Flask better than any other ordinary hip flask that you may own already? For one, it’s much more durable than their normal lineup. The Master Series uses 1.00mm stainless steel, as opposed to the 0.7mm in their other products. The result is a product that maintains the ability to be rust-proof and naturally BPA-free, while being much more resistant to impact. This is something you’ll appreciate after you’ve refilled the flask a few times.

1.0mm 18/8 stainless steel – the strongest you’ll find by far.

Rust-proof + naturally BPA-free; Matte Black Finish

Dimensions: 5.15" x 3.5" x 1"; 10.6 oz; 8oz capacity

Opens wide for easy filling and cleaning Machined steel cap knurled for easy grip; Leak proof and Dishwasher safe

Perfect gift for groomsmen, birthdays, graduation, or retirement.