Hard to clean without a brush, but now is easier. Perfect to carry in backpack and use on the go.

This is a great way to reduce plastic bottle waste and stay hydrated while traveling. It folds flat to get through security then you can just fill it at a water station. No need to wait for the flight attendant to get that first drink of water. The only negative is that it is a little difficult to flip the spout because the recessed area around it is pretty compact. Works fine for me but my husband has a harder time because his fingers are bigger. It is a compact design though and that is what we were looking for. I reccomend attaching a carabiner to the top loop so that, when full, you can clip it to your luggage.

I love the collapsibility(+). BUT it does NOT fit well in most cup holders (-).

I love the collapsibility(+). BUT it does NOT fit well in most cup holders (-).

Used this for an international trip. Worked well for the airport and walking around cities. Love that once it's empty, it's easy to store until the next use.