What a cool idea:

[orange71]

in my experience water bottles always used to fall out (esp. when full) so would always worry if it had tools in it!

 

[jez-4-bikes-max]

Use a ringle cage! They NEVER come out!

 

[gump]

..the cage just comes off with bottle in it!!

 

[jez-4-bikes-max]

Blinkin hell - Youd have to rip it out from the mountings then - that would take some force I'd imagine. Wouldnt have much left of your dainty xc racer downtube if that happened....

 

[gump]

don't you fnd they are a touch fragile after a bit of use? :?

 

[Stick Legs]

I cracked a Ringle cage but I'm sure that that's down to shouldering the bike. Cracked radially from the forward bottle boss bolt.
2 big wahers and a steel bolt (to get it tight) and it lasted until the bike got nicked, probably still working somewhere.