Secret Bottle personalised champagne bottles are not engraved.
Engraving into a pressurised bottle is very dangerous as the structural integrity of the bottle is changed. The bottle can explode or break at any time. This includes whilst doing the engraving, in transit or even just sitting on the shelf.
This is why no champagne house or distributor will endorse or allow engraving on their bottles.
Secret Bottle uses a specialised adhesive application of personalisation that does not compromise the bottle