Built tough from EU food-grade glass-reinforced polypropylene, the Passage Mug holds 16 ounces (475 milliliters) of your favorite hot or cold drink. The Cool Grip sidewalls allow you to grip the mug firmly, even if the contents are hot, while the snug-fitting sipping lid keeps those contents from spilling when you're on the move. The Passage Mug can be stacked with other Passage Mugs and Cups, and is designed to nest into Sea to Summit Passage Bowls or Frontier Pots. Dishwasher and microwave safe, the Passage Mug is designed to go wherever your adventure takes you.