Trash Bag Shrinkflation: Compare Mil Thickness, Bag Count, and True Cost Per Bag

Dana Wolff

By Dana Wolff · Editor, RefillWatch

Published May 28, 2026

Trash Bag Shrinkflation: Compare Mil Thickness, Bag Count, and True Cost Per Bag

Trash Bag Shrinkflation: Compare Mil Thickness, Bag Count, and True Cost Per Bag

You’re tossing out the remnants of dinner, stuffing the refuse from a weekend project, or tackling spring cleaning. The last thing you want is a trash bag that splits open, leaving you with a bigger mess than you started with. But increasingly, the bags we rely on are getting thinner, smaller, and more expensive. Welcome to trash bag shrinkflation.

Manufacturers are quietly reducing bag count per box, decreasing the thickness (measured in mils), and sometimes even shrinking the dimensions of the bags themselves – all while maintaining or even increasing prices. This guide will help you navigate the deceptive world of trash bag prices, compare apples to apples, and find the best value for your needs.

Understanding Trash Bag Specs: Size, Mil Thickness, and Price Per Bag

Before you can effectively compare trash bag prices, you need to understand the key metrics.

  • Size (Gallons): This indicates the bag’s capacity. Common sizes range from 4-gallon (small wastebasket) to 30-gallon (large kitchen or outdoor). Pay close attention to the stated gallon capacity and consider if it truly matches your trash can. An undersized bag will be a constant struggle, while an oversized bag is wasteful.

  • Mil Thickness: Mil is a unit of measurement equal to one-thousandth of an inch (0.001 inch). It indicates the bag’s thickness and, generally, its strength. A higher mil number means a thicker, more durable bag.

    • Low Density (LDPE) Bags: These are typically black or darker colors and are more puncture-resistant. They are better suited for heavier, sharper trash, like yard waste or construction debris. Look for a mil thickness of 1.0 mil or higher for heavy-duty use.
    • High Density (HDPE) Bags: These are typically clear or lighter colors and are more tear-resistant. They are better suited for lighter, less sharp trash, like office waste or food scraps. These are often thinner, ranging from 0.7 mil to 0.9 mil.
  • Bag Count: The number of bags in a box or roll. This is often the first thing manipulated in shrinkflation.

  • Price Per Bag: The only meaningful way to compare trash bag prices: Calculate the cost per bag by dividing the total price by the number of bags. This allows you to directly compare different brands and box sizes.

Calculating the True Cost Per Bag

Let’s look at an example. Suppose you’re choosing between two brands of 13-gallon kitchen trash bags:

  • Brand A: 80 bags for $16.00
  • Brand B: 60 bags for $13.50

At first glance, Brand B appears cheaper. But let’s calculate the price per bag:

  • Brand A: $16.00 / 80 bags = $0.20 per bag
  • Brand B: $13.50 / 60 bags = $0.225 per bag

In this case, Brand A is actually the better deal, even though the initial price is higher. Always do the math!

Pro Tip: Create a simple spreadsheet or keep a running note on your phone to track the price per bag for your favorite brands. This will help you quickly identify price increases and make informed buying decisions.

Spotting Trash Bag Shrinkflation: What to Watch For

Manufacturers are sneaky. Here are some common tactics they use to hide price increases:

  • Reduced Bag Count: This is the most common tactic. Pay close attention to the number of bags in the box. Compare the bag count to previous purchases and note any changes.
  • Thinner Bags (Lower Mil): This is harder to detect without carefully inspecting the packaging. Look for changes in the stated mil thickness. If it’s no longer listed, that’s a red flag. Cheaper resins can also mean a weaker bag, even if the mil thickness seems the same.
  • Smaller Bag Dimensions: This is less common but still happens. Check the bag’s dimensions (width and height) to ensure they fit your trash can properly. A slightly smaller bag might not seem like a big deal, but it can reduce the overall capacity and lead to more frequent bag changes.
  • “New and Improved” Claims: Beware of phrases like “new and improved” or “stronger than ever.” These are often used to justify a price increase or disguise a reduction in bag count or thickness. Read the fine print!

Choosing the Right Trash Bag for Your Needs

Not all trash bags are created equal. Consider these factors when making your selection:

  • Intended Use: What type of trash will you be disposing of? For kitchen waste with food scraps, a strong, leak-proof bag is essential. For lighter waste, like paper and packaging, a thinner bag may suffice.
  • Trash Can Size: Choose a bag size that corresponds to your trash can’s capacity. Too small, and you’ll be constantly struggling to fit the bag. Too large, and it’s wasteful.
  • Durability: If you frequently dispose of sharp or heavy objects, opt for a thicker, low-density bag. Consider the mil thickness and the type of plastic used (LDPE vs. HDPE).
  • Closure Type: Drawstring closures are convenient and prevent spills. Flap tie closures are less expensive but can be more difficult to secure. Consider bags with odor control if smells are an issue.
  • Consider Alternatives: For very light waste, consider reusable shopping bags as liners for small bins. For yard waste, explore composting options.

Leak-Proofing Strategies for Even “Durable” Bags

Even the best trash bags can sometimes leak. Here are a few tips to minimize messes:

  • Double Bag: For particularly messy or leaky trash, double-bag it. This provides an extra layer of protection.
  • Line the Bottom: Place a layer of newspaper or cardboard at the bottom of the trash can to absorb any leaks.
  • Avoid Overfilling: Overfilling a trash bag puts extra stress on the seams and increases the risk of tearing.
  • Dry Wet Trash: Try to drain excess liquids from wet trash before disposing of it.
  • Compost Food Scraps: Consider composting food scraps to reduce the amount of wet waste in your trash.

By understanding the nuances of trash bag pricing and quality, you can combat shrinkflation and make informed purchasing decisions. Don’t be fooled by marketing gimmicks. Focus on the true cost per bag and choose the right bag for your needs. Consider whether concentrated cleaning solutions such as Clorox Disinfecting Wipes[/products/b00hsc9f2c-clorox-disinfecting-wipes-for-allergy-season-bleach-free-mul/] could reduce the overall volume of trash you produce. You can also look into reusable alternatives to plastic wrap, such as ChicWrap [/products/b00gb95p54-chicwrap-veggies-refillable-plastic-wrap-dispenser-includes/]. Your wallet – and the planet – will thank you.

Top pick

Clorox Disinfecting Wipes for Allergy Season, Bleach-Free, Multi-Surface Cleaner, Antibacterial, Fresh Scent & Crisp Lemon, 75 Count Each, Pack of 3

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Prices and availability can change at any time. We may update rankings and picks as market data changes. Affiliate disclosure - Editorial standards