Bottle Bivy Build

We have been working with a group of teachers around New Zealand to build a bottle bivy. You can check it out on the Bottle Bivy Build Blog or our class blog.
When we got to school on Monday the bivy had collapsed again. We do not know why? Maybe we didn’t have it balanced correctly, maybe the glue gets brittle in the cold over the weekend?
Today Zack’s dad came for a visit. He works for Ullrich Aluminium and he is very clever. He is going to help us with a framework to start all over again. We think it will be even better this time. What do you think?