Taking the leather off to clean your flask? Here’s how to wrap it back like a pro:

• Start at the top of the flask neck with the non-tapered end of the leather.
• Wrap it down snugly, and when you get to the bottom, tuck the tapered end under using the bamboo skewer (or a nail file—whatever works!).

Check out the video below to see the wrap in action!

Need to chill? Toss the base in the freezer for at least 4 hours. Or, let it live in there, so it’s always icy when you need it. Another option: pop the base (and flask) in the fridge—great for infused water or milk.

Pro tip for the holidays: short on fridge or freezer space? Stick the base outside on the porch or in the car to cool off before your big party. It’s like a natural freezer!

If your flask and base get a little too cozy, no worries. Here’s how to get them unstuck:

• Hold the base down with one hand, grab the neck of the flask with the other (a tea towel might help for extra grip).
• Give the flask a strong upward pull while pushing down on the base. Really go for it—the glass is tough, and a good tug is all it takes.

Whatever you do, don’t soak it in water! That’ll just make the suction stronger.

Absolutely. These flasks are made from certified lab glass, designed to handle serious heat—like Bunsen burner level heat. So, go ahead, boiling water and vinegar works great to wash up the flask, brew up that tea or get creative.

Just pop the flask into the base and fill it with boiling water. Let it sit for 5-10 minutes, and voilà—your base is ready to go. Tried, true, and easy as pie.

Pro tip: Skip the microwave! The concrete could have tiny traces of metal from the aggregate, plus it doesn’t heat well that way. Stick to boiling water for the best results.