Starbucks reusable cups are usually 16 fl oz (473 ml) for hot and 24 fl oz (710 ml) for cold; limited runs vary by region and season.
You see a stylish cup with the Siren logo and a lid that snaps just right—then the question pops up: how many milliliters does that Starbucks reusable cup actually hold? The short answer that fits most shoppers is simple: the standard reusable hot cup sold year-round is 16 fl oz, which converts to roughly 473 ml, and the staple reusable cold cup with straw is 24 fl oz, about 710 ml. Those two cover the bulk of what you’ll find on shelves and in seasonal drops. Starbucks confirms the 16-ounce hot cup and 24-ounce cold cup in its product listings, and those ounce measurements convert cleanly to the milliliter numbers you see throughout this guide.
How Many ML Is The Starbucks Reusable Cup? Answered By Type
Starbucks currently lists a 16 fl oz reusable plastic hot cup and multiple 24 fl oz reusable plastic cold cups. The math lands at 473 ml and 710 ml, respectively. That’s the size most customers mean when they ask this question. Certain regions also stock cups tied to local demand or seasonal campaigns, so you may spot other capacities; the label on the bottom of the cup or the product page will show the exact ounces.
Quick Conversion We Use
1 US fluid ounce = 29.5735 ml. So:
- 16 fl oz × 29.5735 ≈ 473 ml
- 24 fl oz × 29.5735 ≈ 710 ml
Starbucks Reusable Cup Sizes At A Glance
This table covers the capacities you’ll commonly see for Starbucks-branded reusables, plus how they relate to menu sizes. Use it to match your cup to your go-to drink.
| Reusable Cup Type | Capacity (fl oz → ml) | Typical Use |
|---|---|---|
| Hot Plastic Siren Cup | 16 fl oz → 473 ml | Everyday brewed coffee, lattes, mochas |
| Cold Plastic Cup With Straw | 24 fl oz → 710 ml | Iced coffee, iced tea, Refreshers with ice room |
| Stainless/Insulated Tumbler (Small) | 12 fl oz → 355 ml | Compact hot drinks; tighter bags and cupholders |
| Stainless/Insulated Tumbler (Medium) | 16 fl oz → 473 ml | “Grande-equivalent” hot drinks; better heat hold |
| Stainless/Insulated Tumbler (Large, Hot) | 20 fl oz → 591 ml | Bigger hot drinks; longer sips without refills |
| Cold Cup (Medium, Some Drops) | 16 fl oz → 473 ml | Iced espresso builds; lighter carry |
| Color-Changing Cold Cup | 24 fl oz → 710 ml | Seasonal iced drinks; straw-friendly lid |
Why 473 ml And 710 ml Show Up So Often
Starbucks’ main menu sizes pair neatly with these capacities. A grande drink is 16 fl oz, and many reusable hot cups match that one-to-one. A venti cold drink is 24 fl oz, so the popular reusable cold cup mirrors that volume and leaves headroom for ice style and melt.
Proof Points From Starbucks’ Listings
Hot Reusable Cup: 16 fl oz → 473 ml
The reusable plastic hot cup on Starbucks’ menu is listed at 16 fl oz. Convert that and you get roughly 473 ml. It’s single-wall plastic and top-shelf dishwasher-safe, with a lid designed for hot beverages. (See Starbucks’ “Siren Logo Plastic Hot Cup – 16 fl oz” product page.)
Cold Reusable Cup: 24 fl oz → 710 ml
Starbucks also lists a 24 fl oz reusable cold cup with straw lids. Convert that and you land at about 710 ml. Many seasonal designs—like glitter or color-changing versions—share this 24-ounce capacity. (See the “Plastic Reusable Cold Cup with Lid & Straw – 24 fl oz” product page.)
Using A Personal Cup For Any Order
Since January 2024, Starbucks accepts a clean personal cup for café, drive-thru, and mobile orders in the U.S. and Canada. That makes reusables practical even when you order ahead. The company outlined this in a press release, and local markets share similar updates as the rollout spreads.
Close Variation: Starbucks Reusable Cup Sizes In Milliliters — By Size Name
You’ll hear Starbucks sizes in names—tall, grande, venti—rather than “small/medium/large.” Here’s how those map to the capacities you’ll see in reusable cups and drink builds.
Tall (12 fl oz → 355 ml)
This is the compact daily carry. If you prefer shorter milk ratios in espresso drinks or a simple brewed coffee without a long finish, 355 ml hits the mark. It also slips into tight cupholders and handbags.
Grande (16 fl oz → 473 ml)
This is the base reusable hot cup size. It’s the sweet spot for most espresso drinks and brewed coffee. If your question is how many ml is the Starbucks reusable cup? the everyday answer is this 473 ml size for hot drinks.
Venti Hot (20 fl oz → 591 ml)
Great when you want more sips from a latte or a big Americano. Many insulated tumblers target this range to hold heat longer on commutes.
Venti Cold (24 fl oz → 710 ml)
The standard straw cup lands here. It’s ideal for iced beverages where ice size and melt change perceived volume. If you ask again, how many ml is the Starbucks reusable cup? for cold plastic with straw, the solid answer is 710 ml.
Picking The Right Capacity For Your Drink
Iced Drinks: Plan For Ice Style
Nugget ice takes more space than large cubes. A 24 fl oz cold cup (710 ml) gives baristas room to build a shaken espresso or a Refresher with the ice you prefer, without pushing the lid.
Milk-Heavy Drinks: Watch Headroom
Cappuccinos and cold foams need space for froth. Staying with a 16 fl oz (473 ml) hot cup or 24 fl oz (710 ml) cold cup keeps texture intact.
Commutes And Heat Hold
If you’re stuck in traffic or in long meetings, an insulated 20 fl oz (591 ml) tumbler is handy. You won’t refill as often, and drinks stay closer to the temperature you like.
Regional Notes You Might See
The U.S. products show ounce measures first; the conversions here are the precise ml equivalents. In the UK and other markets, both ounces and milliliters may appear on pages or packaging, and seasonal merchandise can vary by country. When in doubt, flip the cup over—the molded marking or printed label lists the capacity.
Care, Lids, And Fit
Lid Types
Hot cups use sip lids with a narrow opening. Cold cups use straw lids. Don’t swap those across hot and cold builds; each lid matches its cup’s job.
Dishwasher And Heat
Most plastic reusables are marked top-rack dishwasher-safe. Hot plastic cups are single-wall; remove the lid before microwaving if the cup’s product page allows it. Insulated steel tumblers aren’t for microwaves at all.
Bar Setup And Ordering
Hand the cup over clean. If you order ahead in the app, pick the personal cup option and pass the cup at pickup. The system works at the counter, in drive-thru, and for mobile orders in participating stores.
When Your Cup Doesn’t Match The Menu Size
Bringing a 12-ounce tumbler but ordering a grande? Ask for “no water” in shaken drinks or a lighter ice fill to keep flavors balanced. If you carry a 24-ounce cold cup and want a tall or grande, your barista can build to the requested recipe and leave the rest as headroom.
How We Sourced The Numbers
Two places matter: the product page for the reusable cup and the standard drink size chart. Starbucks’ own listings show the ounce measurements on the hot and cold reusables mentioned above; we convert to ml using the standard 29.5735 ml per US fl oz. Policy pages confirm that personal cups work across order channels in supported markets.
Ounce To ML Quick Converter For Starbucks Sizes
| Starbucks Size | Ounces (US fl oz) | Milliliters (ml) |
|---|---|---|
| Short (Hot) | 8 | 237 ml |
| Tall | 12 | 355 ml |
| Grande | 16 | 473 ml |
| Venti (Hot) | 20 | 591 ml |
| Venti (Cold) | 24 | 710 ml |
| Trenta (Cold, Select Markets) | 31 | 916 ml |
A Few Buying Tips
Check The Bottom Stamp
The capacity is usually molded into the base. If you’re in a rush, it’s the fastest way to confirm ounces before you leave the store.
Match Your Favorite Drinks
If you live on iced lattes or Refreshers, the 24 fl oz cold cup (710 ml) keeps ratios right once ice goes in. If you order brewed coffee or hot espresso drinks, the 16 fl oz hot cup (473 ml) fits recipes and milk textures well.
Seasonal Drops Sell Out
Holiday cold cups and limited colorways tend to go fast. If a specific design matters, set alerts in the Starbucks app or swing by early in the season.
Trusty Links If You Want To Double-Check
You can verify the sizes right on Starbucks’ site: the 16 fl oz reusable hot cup and the 24 fl oz reusable cold cup both show ounce capacities that convert to the ml values shared here. Starbucks also explains that personal cups are accepted across café, drive-thru, and mobile orders in its press release.