Birthday Shot Glass Necklace

shot glass
a small glass adequate to hold a single swallow of whiskey
A shot glass is a small glass designed to hold or measure liquor, which is either drunk straight from the glass ("a shot") or poured into a mixed drink.
Used for serving shots and layered cocktails. Cocktails in shot glasses are meant to be drunk quickly, in one gulp. The ideal option for busy and lively parties. Standard volume 40 to 60 ml.
A small glass used for serving liquor

birthday
The day of one's birth
The anniversary of something starting or being founded
an anniversary of the day on which a person was born (or the celebration of it)
A birthday, as the term implies, is the day or anniversary of the particular day on which a person was born. Though by no means universal, birthdays are celebrated in numerous cultures, often with a party or, in some instances, a rite of passage.
Birthday (Ad Gunu) is a 1977 full-length Azerbaijani feature film. The film plot is based on Rustam Ibrahimbeyov's short stories "Birthday" and "Business Trip".
The annual anniversary of the day on which a person was born, typically treated as an occasion for celebration and present-giving

necklace
(chiefly in South Africa) Kill (someone) with a tire necklace
jewelry consisting of a cord or chain (often bearing gems) worn about the neck as an ornament (especially by women)
A necklace is an article of jewellery which is worn around the neck. Necklaces are frequently formed from a metal jewellery chain, often attached to a locket or pendant.
In combinatorics, a k-ary necklace of length n is an equivalence class of n-character strings over an alphabet of size k, taking all rotations as equivalent. It represents a structure with n circularly connected beads of up to k different colors.