bottle cage suitable for hanging off back of saddle

Got myself the minoura double water bottle cage mount / holder that bolts under the saddle and got a couple of cheap plastic cages. Both of the plastic cages broke during the first ride.
Any suggestions for a decent cage that is robust enough to hang out the back with full 800ml bottles?
Edited: To make it more coherent
Any suggestions for a decent cage that is robust enough to hang out the back with full 800ml bottles?
Edited: To make it more coherent
0
Posts
To answer the question though, I've found Elite Sior to be the most tenacious bottle carriers I've used. Too tenacious with some bottles in fact, but tis only a good thing for behind the saddle.
Simple, I am a big fat sweaty jafa with 107 miles to do across Dartmoor in June. I just didn't fancy having a camelbak on for 9 hours. Already got 2 bottles on the frame. Thanks for the suggestion.
No doubt hilarious but lost on me.