Is "alcohol custody" a legit term?

Here in Malaysia, some pubs allow customers to keep their alcohol beverage (bottles or cans) with the pubs under some terms and conditions.

What is the most suitable term for such service? Is "custody" suitable? "Alcohol custody"?

Update on the flow:

1. Customer A visit Pub A and ordered 3 Chivas Regal 18 years (1L each total 3L)
2. End of the night customer consumed 2L.
3. Customer ‘keep’ the balance 1L with the Pub A.
4. Pub A recorded the customer detail and balance of the beverage.
5. The next time the same customer return he/she can request the balance alcohol (1L) for enjoyment.

I can comment on this subject with considerable authority from a U.S. perspective, having consumed vast quantities of alcoholic beverages over many years in countless North American drinking venues.

I've not heard the term "custody" used to describe the practice, but a number of bars and pubs provide lockers for customers to store their own preferred brands of wine and liquor. Depending on the policies of the establishment, customers may pay for a locker or they may be awarded the privilege with regular patronage or VIP status. HERE is an article with photos and details.