Foldable 6-Axis ELFIE Quadcopter WIFI 720P FPV 3 Battery Camera Drone JJRC H37
After a lot of time trying it. I can definetely say that it was a waste of money. One of its rotors need readjustment from time to time (it moves inside the copters wind). It actually cannot fly and it can rarely be calibrated.
2L Water Bladder Bag Backpack Hydration System Camelback Pack for Hiking Camping
Even after cleaning it carefully, it still gives an awful plastic taste in the water. I would consider it risky to use it for potable water.