I ride a 47cm bike and there is very little room for a decent sized water bottle on my bike. Every time I go for a drink, I have to mash the bottle against the top tube to get it in and out of the cage. I was told to try a side mounted bottle cage. The bottle slips out the side instead of up and over the top, eliminating all the top tube mashing. However, it just does't look very secure to me. Wouldn't the bottle go flying as soon as I went over a bump? Anyone else have any experience with one of these?