Apparently, this cup was SUPER vacuum-sealed because I was treated to a powerful nasal douche of cinnamon peach juice to my sinuses. I was amused, but also quite uncomfortable nasally. It was delicious (since I ate the cup after cleaning up the incident, the post nasal drip was a little off putting though), however I wish they opened without exploding and/or squirting long distances. Especially since they are for kids, or for adults who eat fruit cups in bed while watching supernatural shows made for kids.
Also, I've passed this on to Del Monte and asked them if I could send them my doctor's bills if I get a sinus infection from the peach cinnamon sugar water still lingering inside my face, but they are staunchly ignoring me, just like all the boys I ever loved...
Most hilarious comment when I posted about it on Facebook:
Just proves that no matter how well you prepare for a known eventuality, the universe is just going to shoot cinnamon peach juice up your nose anyway. - Lora-Lee