Bottle holders work a treat under £6 on eBay perfect size for my bottles.
https://www.ebay.co.uk/itm/Black-Cup-Holder-Car-Storage-Drinking-Bottle-Can-Mug-Mount-Stand-Universal/122955014149?hash=item1ca0b0a005:g:YAcAAOSwor1aelJn
https://www.ebay.co.uk/itm/Black-Cup-Holder-Car-Storage-Drinking-Bottle-Can-Mug-Mount-Stand-Universal/122955014149?hash=item1ca0b0a005:g:YAcAAOSwor1aelJn
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