Anyome tried the Zefal Gizmo ?

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BigAndyH

Guru
Location
Bournemouth
I used one for many years on my seat tube, and never had any problems with it slipping even with with 750mm bottles, just make sure you get the right size. If I recall the only thing to watch is that if the bolts are too long they will go through the gizmo and damage the paint work.
 
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