You know how in Finland they give new parents “baby boxes” (a giant box for the baby to sleep in that comes with basic supplies for the parents)? Imagine symbiont hostmechs giving each other boxes whenever one of them creates or adopts a new symbiote, even when there’s a war going on, regardless of faction. Blaster and Soundwave send passive-aggressive notes to each other in the bottom of their boxes that typically read, “I still hate you, but your bitlet is cute”.