Odd thumb trying to keep container from tipping over = odd looking gesture-thing. "White streaks" in the form of odd squares or rectangles outlines showing that the containers are Martian's beloved creatures that can no-longer be contained. They are past repair because their creatures are mostly gone!
The Terrible and Horrific Clean-up Of Creatures When Mars Lost It's Atmosphere In Extreme Antiquity ! The act of putting endless dead creatures into containers! November 15th, 2016
Please notice how martians utilize "white streaks" around the active container, but the one that is filled up below it to the right does not have a "white-streak" around it. Also, it is shown to have those ringlets for tie-downs. As if to say, it has not yet been tied-down yet because as you can see, the dead creatures have not filled the container! As it is bunched up between the used-up glove representation and the filled container.
Objects Growing Out Of A Planter Box October 26, 2016 This very well could be in representation form and not mean't to be just for plants, but could have something to do with the loss of creatures when Mars lost it's atmosphere and it's surface was destroyed in extreme ancient times!
I say that because so much of what Curiosity Rover seems to be telling me, is that it is related to sculptured diorama memorials in dedication to the ending of life on the surface of mars. Such as their beloved creatures, involving mass die off etc.