Choose capacity first
Capacity controls menu fit. Smaller 8 oz to 12 oz cups work for samples, dessert, and compact drinks. 16 oz and 20 oz cups work for daily iced coffee and milk tea. Larger cups fit smoothies and high-volume cold drinks.
A size guide should start with the drink menu, not the carton. Match each menu item to the expected serving volume, ice level, topping space, and lid style. A smoothie may need more headroom than tea, while a dessert cup may need a wider presentation.
Confirm rim diameter
Rim diameter controls lid family. A 95mm cup needs a compatible 95mm lid; a 98mm cup needs a compatible 98mm lid. Checking this before ordering prevents fit mistakes.
Capacity and rim are separate decisions. Two cups can both be 16 oz but use different rim families. This is why GreenPack Life keeps rim diameter visible in product names, product cards, and specification pages.
Use dimensions for equipment fit
Cup height, bottom diameter, and carton size matter for storage, cup dispensers, sealing workflow, and delivery packing. Keep SKU-level dimensions visible in the buying path.
Dimension checks also help operators compare similar SKUs. A cup with the same capacity may have a different height or bottom diameter, which can affect cup holder fit, shelf storage, sealing machine setup, or how the drink looks on the counter.
Common PET cold cup ranges
Smaller cups such as 5.5 oz, 8 oz, 9 oz, and 10 oz are often used for samples, dessert portions, kids drinks, or compact cold beverages. Mid-size 12 oz, 14 oz, and 16 oz cups support daily cafe and tea service.
Larger 18 oz, 20 oz, 24 oz, 30 oz, and 32 oz cups are more common for boba, fruit tea, iced coffee, smoothies, and high-value specialty drinks. These sizes should be reviewed together with lid and straw choices.
Sample before scaling
Samples help confirm clarity, wall feel, lid fit, stackability, and how the cup looks with your actual drink. They are especially useful when changing rim families or moving from generic stock cups to custom printed cups.
For a DDP quote, samples and bulk pricing should be connected. The sample decision confirms fit; the quote decision confirms landed cost, case pack, destination, and reorder practicality.
After sample approval, record the cup capacity, rim family, compatible lid style, straw choice, and preferred case quantity. This turns size selection into a repeatable buying standard instead of a one-time comparison between similar-looking cups.