Bottle-keep is a:
service which is provided at some Japanese drinking establishments where a patron can purchase a bottle of liquor and have the unfinished portion stored until a later visit. A bottle retained in this manner is called a "keep bottle". The service is offered by a variety of drinking establishments, from casual izakaya to bars in some first-class hotels. For regular customers, the system is less expensive than paying for single drinks. Some restaurants and bars outside of Japan have also adopted the service.
What's the translation of bottle-keep in French? Google Translate and DeepL both suggest "garde-bouteille", which makes sense, but I can't find a single use of it in French texts. I recall some nighclub based in France had a bottle-keep bar a decade ago, so there may be some well-established French term for bottle-keep.
I unsuccessfully also tried Linguee: