They love playing with containers and jars, absolutely. The male I have been describing especially enjoyed opening tightly sealed jars - although he displayed a

They love playing with containers and jars, absolutely. The male I have been describing especially enjoyed opening tightly sealed jars - although he displayed an aversion to all jars for a bit of time after one of the few times we put him with the octopus I'd call the "alpha female". He had handed her a large jar to play with, in what I would describe as an act of kindness. She proceeded to open it and take it back to him. He squeezed inside the jar - and then with intense rapidity, she immediately began screwing the lid back on, trapping him inside. We had to let the poor guy out after she waltzed away and seemingly had zero interest in letting him out. We never let the two of them play together unsupervised after that, worried for his safety.