How do you prevent shampoo and such from bursting when changing to higher elevation?

Im going to colorado, and im packing shampoo, condition, face wash, and sunscreen. all brand new. How can i pack them so that they wont burst when the elevation changes?How do you prevent shampoo and such from bursting when changing to higher elevation?
I just got back from Colorado (I'm in the Seattle area). I had no problems with my toiletries bursting at all. I always make sure the lids are secure and put them in a zip lock bag incase they ooze.





In all my travels I've never had shampoo or anything else 'burst', only ooze a bit.How do you prevent shampoo and such from bursting when changing to higher elevation?
Well you could do what the first person says, or you could pack them in plastic baggies....that works best for me!
There is alway a little air in the bottle, just squeeze that out, then it has room to expand!! :)

revlon color