Using the Sea to Summit Passage Cup is a breeze. Just fill it up with your favorite beverage. The Cool Grip sidewalls make it safe to hold, even with hot drinks. When you're on the move, put the silicone sipping lid on to prevent spills. The lid can be folded inside the cup to save space when not in use. This cup is great for camping and overlanding trips. You can stack it with Passage Bowls and Frontier Pots to save space in your pack. It's microwavable and dishwasher safe, so cleaning is easy. Just be careful when handling it after it's been in the microwave as it may be hot. Also, avoid using abrasive cleaners that could scratch the cup.