Single vs Double PE Laminated Paper Cups: What Coffee Shops Need to Know

If you've ever wondered why some paper cups feel slick on the inside while others have a coating on both sides—or which type is safe for hot drinks—you're not alone. Choosing the right paper cup isn't just about looks; it affects safety, function, and customer experience, especially in specialty coffee service.

In short: Single PE laminated cups have a plastic coating only on the inside (the side that touches liquid), while double PE cups are coated on both sides. Most standard coffee shop cups are single PE. Both come in specific fluid ounce (OZ) sizes measured by volume, not weight.

What Are Single and Double PE Laminated Paper Cups?

Paper cups used in coffee shops are commonly laminated with polyethylene (PE) to make them liquid-resistant. The key difference lies in where the PE coating is applied:

• Single PE laminated paper cup: Only the interior (liquid-contact) side is coated with a smooth layer of PE. These are the most common cups in markets and cafés.
• Double PE laminated paper cup: Both the inside and outside of the cup are coated with PE. This provides additional durability and moisture resistance.

How Paper Cup Sizes Are Measured: Ounce (OZ) Explained

Cups are sized by liquid volume in ounces (OZ), not by weight. One fluid ounce (US) equals 29.571 ml, or roughly 29.6 grams of water. In this system:

• 1 OZ (fluid ounce) ≈ 28.34 ml ≈ 28.34 g
• This measurement reflects how much liquid the cup can hold, not the cup’s weight or the paper’s grammage.

Common Paper Cup Sizes in Ounces and Milliliters

Here are the standard sizes used in coffee shops and their corresponding capacities:

• 3 OZ ≈ 60 ml (tasting/sampling cup)
• 6.5 OZ ≈ 200 ml (espresso cup, promotional use)
• 7 OZ ≈ 220 ml (gift/retail cup)
• 8 OZ ≈ 240 ml (gift/retail cup)
• 9 OZ ≈ 250 ml (standard takeaway cup)
• 12 OZ ≈ 350 ml (soda/pop/juice cup)

For practical production and identification, cup dimensions are also given in millimeters (diameter × base × height):

• 3 OZ ≈ 52mm × 36mm × 50mm
• 6.5 OZ ≈ 72mm × 53mm × 70mm
• 7 OZ ≈ 73mm × 53mm × 78mm
• 8 OZ ≈ 74mm × 53mm × 85mm
• 9 OZ ≈ 75mm × 53mm × 88mm
• 12 OZ ≈ 80mm × 53mm × 110mm

What Each Size Is Typically Used For

Different cup sizes serve different purposes in retail and F&B environments:

• 3 OZ: Tasting or sample cups
• 6.5 OZ: Espresso cups, promotional give-aways, 4S shop service cups
• 7 OZ: Promotional or branding cups
• 8 OZ: Branded service or gift cups
• 9 OZ: General takeaway or branding cups
• 12 OZ: Cold drinks—cola, soy milk, general beverage service

What Determines Cup Paper Weight and Quality?

Cup quality is primarily determined by the paper's basis weight (grammage), not the machine. Key points:

• Heavier and higher-quality paper results in better cup strength and printability.
• Standard market-use paper cups: 135–210 gsm, single PE
• Advertising/promotional cups: 190–280 gsm, single PE
• Export-grade cups: 190–280 gsm, double PE
• General paper bowls: 160–220 gsm
• Instant noodle bowls (e.g., Master Kong, Uni-President): inner bowl ~250 gsm single PE; outer sleeve ~250 gsm greyback paperboard

How to Choose the Right Cup for Your Coffee Business

Your choice depends on:

• Intended use (hot or cold drinks)
• Target market (local or export)
• Brand presentation needs
• Cost and material availability

Single PE cups are sufficient for most hot coffee servings, especially 6.5–12 OZ sizes. Double PE is recommended for export markets or where extra moisture resistance is needed.

Frequently Asked Questions

What does PE mean in paper cups?

PE stands for polyethylene, a plastic coating applied to paper to make it liquid-resistant. Single PE means the coating is only on the inside; double PE has it on both sides.

What is the difference between single and double PE paper cups?

Single PE cups have a plastic coating only on the inside (where the liquid goes). Double PE cups have plastic on both the inside and the outside, offering better durability and moisture resistance.

How do I know what size paper cup I need for coffee?

Coffee shops typically use 6.5 OZ (espresso), 8–9 OZ (regular coffee), and 12 OZ (cold drinks). Measure by fluid ounces, where 1 OZ ≈ 29.6 ml. Common sizes also include 3 OZ (sampling), 7 OZ (gift), and 12 OZ (soda).

What does OZ mean when referring to paper cups?

OZ stands for fluid ounce, a unit of volume. One US fluid ounce equals approximately 29.571 ml. It indicates how much liquid the cup can hold, not the weight of the cup or its material.

Are single PE cups safe for hot coffee?

Yes, single PE laminated cups are designed to handle hot liquids like coffee. The PE coating prevents the paper from absorbing the liquid and weakening. Double PE adds more protection and is often used for exports.

What paper weight is best for paper cups?

Most paper cups use 135–280 gsm paper. Market cups usually use 135–210 gsm (single PE), while export or premium cups may use 190–280 gsm (often double PE). Heavier paper generally means better strength and print quality.

Recommended FrontStreet Coffee for Paper Cup Brewing

For serving coffee in paper cups, FrontStreet’s Ethiopia Humbera offers bright citrus and floral notes ideal for 8–9 OZ cups, while the Brazil Queen Manor brings smooth chocolate and nuttiness suited for 12 OZ cold cups. Both showcase clarity and balance when brewed for takeout. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.