Quick answer
Energy drinks do not share one expiry rule. For a sealed shelf-stable can, read both the stamp and label: a best-before date concerns quality, while a production code records when it was made. Once opened, follow the product's after-opening instructions. Neither kind of date proves that a damaged or poorly stored drink is safe. USDA date-label guidance
This guide covers commercially packaged shelf-stable energy drinks. Coffee-based products, protein drinks and energy shots may have different instructions.
What does the stamp tell you?
| Label or condition | How to use it |
|---|---|
| Best before / Best if Used By | A quality date; check storage and product instructions too. |
| Production / born-on code | A manufacture record, not automatically a consume-by date. |
| Opened can | Check after-opening directions; the sealed-can date is insufficient. |
| Damaged can or uncertain history | A future date cannot establish safety. |
Monster's US FAQ says its matching code is a production or born-on date: A–L gives the month, the next two digits the year and the next two the day. Later characters identify factory and time. The FAQ does not supply a universal consume-by interval to add. Use this explanation only for matching US packaging, not another brand or an unfamiliar imported can. Monster US FAQ
If the stamp is unclear, photograph the entire code and label. Give the manufacturer the flavor, size and country of purchase. Ask what the code means and which storage advice applies; guessing an extra year is less useful than identifying the product.
Keep sealed and opened drinks separate
Store a sealed shelf-stable drink as directed and retain its label. A shelf-life statement counted from manufacture does not restart at purchase. There is no reliable extra-months allowance covering every formula and market.
After opening, follow any refrigeration requirement and stated use-within period. If saving a remainder, protect it from contamination in a clean, covered container and refrigerate at 40°F (4°C) or below. Refrigerating it does not establish how many days it will last. Ask the maker if its instructions leave that unanswered. FDA safe-storage advice
The difference matters even among caffeinated products. The maker of 5-hour ENERGY shots says to discard the remainder within three days of opening and says refrigeration is unnecessary. Those instructions apply to its shots, not full-size canned energy drinks. 5-hour ENERGY instructions
When to discard it
Do not use a leaking, swollen, punctured or seriously damaged can. Discard a drink with mold or a suspicious smell or appearance. Never taste questionable food or drink to decide whether it is safe; normal appearance cannot clear a poor storage history.
Caffeine is a separate label check. Feeling an energy effect is not a spoilage test. Continue to follow serving directions, caffeine statements and product warnings regardless of the date.
FAQs
Can I drink it after the best-before date?
The date alone cannot settle that. Quality may decline, but product instructions, package condition and handling history still matter. There is no universal extension.
Is Monster's production date its expiry date?
Not according to its US FAQ. Confirm that the code explanation matches your market and package before using it.
Can I use soda's after-opening period?
Use your energy drink's own instructions. A general soft-drink estimate does not establish a tested period for a different formulation.
Sources
Sources and draft evidence reviewed October 31, 2026. Manufacturer advice applies to the named product; follow stricter local guidance and your package. How we research our guides.