Types of Mylar Bags: Every Style, Size & Feature Compared (2026 Guide)

Key Takeaways

• There are 8 primary mylar bag types, each designed for specific products, industries, and use cases.
• Stand-up pouches (SUPs) are the most versatile and popular format, accounting for over 60% of the flexible packaging market in 2026.
• Flat pouches offer the lowest cost per unit but lack shelf presence and self-standing capability.
• Child-resistant (CR) mylar bags are mandatory for cannabis, CBD, and pharmaceutical products in most jurisdictions.
• Choosing the right type depends on four factors: your product, your shelf or storage environment, regulatory requirements, and budget.

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Walk into any grocery store, pet supply shop, or dispensary, and the packaging you see is dominated by mylar bags — in dozens of shapes, sizes, and configurations. But "mylar bag" is about as specific as saying "box." There are flat pouches, stand-up pouches, gusseted bags, flat-bottom bags, bucket liners, spout pouches, child-resistant bags, vacuum-compatible bags, and more.

Choosing the wrong type wastes money. Choosing the right one protects your product, elevates your brand, and satisfies regulatory requirements. This guide breaks down every common mylar bag format with honest comparisons.

The 8 Primary Mylar Bag Types

1. Flat Pouch (Pillow Bag)

The simplest mylar bag format — a flat, sealed pouch with no gussets, no bottom structure, and no standing capability.

Construction: Two sheets of mylar laminate heat-sealed on three sides (or four sides for a fully enclosed design).

When to choose flat pouches:

• You need the absolute lowest per-unit cost
• The product will be stored in drawers, bins, or buckets (not displayed upright)
• You are packing small quantities (under 4 oz)
• Long-term food storage where aesthetics do not matter

2. Stand-Up Pouch (SUP / Doypack)

The workhorse of modern flexible packaging. A bottom gusset allows the bag to stand upright on retail shelves, giving it the shelf presence of a rigid container at a fraction of the weight and cost.

Construction: Front panel, back panel, and a W-shaped or K-sealed bottom gusset. Optional resealable zipper at the top.

When to choose stand-up pouches:

• Your product will be displayed on retail shelves
• You want resealable convenience for the end consumer
• Brand presentation and printing area matter
• You need a balance of cost, functionality, and shelf appeal

Quotable fact: Stand-up pouches account for more than 60% of the global flexible packaging market by volume, with annual growth of 5.8% projected through 2028 (Smithers Pira, The Future of Flexible Packaging to 2028).

3. Side-Gusseted Bag

A rectangular bag with inward-folding gussets on the left and right sides, creating a wider profile when filled while maintaining a compact footprint when empty.

When to choose side-gusseted bags:

• Your product is dense and heavy (coffee beans, grains, pet food)
• You want a tall, narrow profile on shelf
• You need one-way degassing valve compatibility
• Classic "brick" shape is preferred for your brand

4. Flat-Bottom Pouch (Box Pouch / Block-Bottom Bag)

A premium format that combines the convenience of a flexible pouch with the stability and shelf presence of a box. The flat bottom creates a wide, stable base.

When to choose flat-bottom pouches:

• Premium positioning is critical to your brand
• Maximum printing surface area is needed (5 printable panels)
• Superior shelf stability is required (e.g., heavy products that tip in SUPs)
• You are competing with rigid containers on shelf

5. Three-Side Seal Pouch (Sachets / Stick Packs)

Similar to flat pouches but specifically sized for single-serve applications — sugar packets, seasoning sachets, supplement powders, and sample packs.

6. Bucket Liner (5-Gallon Bag)

Large-format flat pouches specifically designed to line food-grade 5-gallon buckets for long-term food storage.

When to choose bucket liners:

• You are storing 25–35 lb of dry food per unit
• Long-term storage (10–30 years) is the goal
• Cost per ounce of storage must be minimized
• Secondary container (bucket) provides structural support and pest protection

7. Child-Resistant (CR) Mylar Bags

Mylar pouches with integrated child-resistant closure mechanisms, designed to meet CPSC testing requirements (16 CFR § 1700.20). These are not optional for cannabis, many CBD products, and certain pharmaceutical items.

CR Mechanism Options:

8. Spout Pouches

Flexible pouches with an integrated plastic spout and cap for liquids and semi-liquids. The mylar laminate body provides barrier protection while the spout enables controlled pouring.

Feature Comparison Matrix

How to Choose the Right Type

Decision Framework

Ask yourself these four questions in order:

Question 1: What is your product?

Question 2: Where will it be displayed or stored?

Question 3: Any regulatory requirements?

Question 4: What is your budget?

Common Optional Features

Every mylar bag type (except bucket liners and basic sachets) can include these add-on features:

Industry-Specific Recommendations

Frequently Asked Questions

What is the most popular type of mylar bag?

The stand-up pouch (SUP) is the most popular mylar bag format globally, accounting for over 60% of the flexible packaging market by volume. Its combination of self-standing shelf presence, resealable zipper option, excellent print surface, and moderate cost makes it the default choice for most retail food, coffee, snack, and supplement brands. The format was originally invented by French engineer Louis Doyen in 1962 and has become the industry standard for good reason.

Can I use a flat pouch as a stand-up pouch?

No. Flat pouches lack the bottom gusset structure that allows stand-up pouches to remain upright on a shelf. If you fill a flat pouch and try to stand it up, it will fall over immediately. If you need shelf-standing capability, you must use a stand-up pouch, flat-bottom pouch, or side-gusseted bag. Flat pouches are designed for lying flat — in drawers, bins, buckets, or mailed envelopes.

What type of mylar bag is best for long-term food storage?

For long-term food storage (10–30 years), flat pouches in 5–7 mil thickness are the most common choice because they offer the best cost-per-ounce ratio and fit efficiently inside 5-gallon buckets. Dedicated bucket liners (18" × 28" to 20" × 30") are specifically sized for this application. Stand-up pouches also work well for smaller quantities (1–2 lb portions) that you want to access individually without opening a large bag.

Do I need child-resistant mylar bags for CBD products?

In most states with cannabis or CBD regulations, yes — child-resistant packaging is required for ingestible CBD products including gummies, tinctures, and capsules. Even in states without explicit CBD packaging laws, using CR packaging is considered a best practice for liability protection. CR mylar bags must meet the CPSC 16 CFR § 1700.20 testing standard, which requires that fewer than 20% of tested children (ages 42–51 months) can open the package within 5 minutes.

How do spout pouches compare to bottles for liquids?

Spout pouches offer significant advantages over rigid bottles: they weigh 75–85% less (reducing shipping costs), use 60–70% less material, and lie flat when empty for efficient shipping and storage. The trade-off is that they have a shorter shelf life than glass bottles (12–18 months vs. 24+ months for glass) and cannot be pressurized. For cold brew coffee, sauces, baby food, and liquid supplements, spout pouches provide an excellent balance of barrier performance, cost, and sustainability.

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Not sure which mylar bag type is right for your product? Cubit Packaging offers all 8 formats with custom sizing, printing, and feature options — from 500 units. Tell us about your product and we will recommend the right bag →

Explore Each Mylar Bag Type

Dive deeper into specific mylar formats and applications:

• Cannabis & CBD Mylar Bags — Child-resistant packaging requirements and design options for regulated products.
• Coffee Mylar Bags — Degassing valves, sizing, and custom printing for coffee roasters.
• Mylar Bags for Freeze-Dried Food — Long-term storage optimization with oxygen absorbers.
• Wholesale Mylar Bags — Bulk pricing and supplier evaluation for high-volume orders.
• What Is Mylar Made Of? — The material science behind BoPET film properties.

Shop by Mylar Bag Type

• Stand-Up Pouches — The most popular retail format (60%+ market share)
• Child-Resistant Mylar Bags — CPSC-tested CR packaging
• Kraft Mylar Bags — Natural kraft exterior with mylar barrier
• Holographic Mylar Bags — Premium holographic finish for shelf appeal
• Mylar Bags with Valve — One-way degassing valves for coffee and fermented foods

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