I think it is a bit too tall, something more like this tea light holder from Asda might be better to use, you could also put a small pebble inside it.
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If you use velcro, you need the industrial strength one, was that they type you used?
Twinkle my Syrian doesn't like water bowls at all, he won;t go near them. He has two bottles instead.
I think it is good to always give them the option, 1 bottle and 1 bowl and see which they use/prefer.