Another daring escape/rubbermaid question

[ChristinaM]

This time I KNOW the lid was on tight....it was still on tight this morning. My daughter comes to me once we all get up ( she wakes earlier than us ) and informs me she saw Promise (brb) oh about an hour earlier in her room uggggggggggggg.

I did end up finding her after searching for a bit. She was hiding in my other daughter's room. She was sooooo cold when I picked her up. I put her body against my chest to warm her up, and the ungrateful bugger bit my hand as it passed infront of her face LOL.

Now, here's my question.... Did I pick a crappy rubbermaid for her? I have this one

As I inspected closer...I noticed that it only really snaps shut on the ends, not the sides. Will putting additional weight on top keep it secure? Or should I be finding myself another rubbermaid????

Thanks