1L Collapsible Water Bottle

Rolled this up in my jacket pocket on a whim and forgot it was even there until the water fountain ran dry. The pop up top is way easier to drink from one-handed than I expected, and it holds a full liter without feeling bulky on my back.

Took this on a 9-mile hike and barely noticed the weight compared to my old hard bottle. The pop up top is handy for quick sips without stopping, and it held a full liter without any plastic taste.

I rolled this up and it fit in my jacket pocket when empty, which is the main reason I bought it. The pop up top makes it easy to drink without stopping, though you do have to bite it a little to get water flowing.