This fantastic pack-up bottle by Light My Fire is BIG when you need it and small when you don't. The Light My Fire Pack-up-Bottle holds up to 700 ml of liquid. Collapsible into three parts. The Pack-Up-Bottle benefits from having a standard-size bottleneck, which allows for easy drinking and re-filling. The standard-size bottleneck also provides the ability for the Pack-Up-Bottle to be used in conjunction with a water filter.