For a no-frills flask that’s perfect to toss in your bag when you’re out camping or exploring, turn to Stanley. The classic brand has been crafting solid, well-made food and drink gear since 1913. Their latest flask is the first in the Adventure Series which is aimed at being both essential and rugged. With more grip than its predecessors, the Adventure Series Flask is made of 18/8 stainless steel which won’t rust and is naturally BPA-free. The integrated lanyard assures you will never lose your cap and the flask itself is leakproof and fully packable. The 8 oz Stanley Adventure Series Flask is ideal for those looking for a discreet yet rugged way to grab a quick nip.