Sea to Summit Passage Insulated Mug made of EU food-grade glass-reinforced polypropylene, the passage mug holds 475ml of your favourite 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. Precise two-piece moulding creates a double-walled mug that insulates well, yet retains a slim profile. The passage mug can be stacked with other passage mugs and cups and is designed to fit into passage bowls or frontier pots. Dishwasher and microwave safe, the passage mug is designed to go wherever your adventure takes you.