Best Filament Purge Bins for 3D Printers

Updated 2026-10-30

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Quick answer: Estimate your purge waste first, then pick a bin class that fits your printer and desk: a mounted tray for tight spaces, a desk-side bin for frequent filament changes, or a sorted container if you recycle. In our labelled planning example, 520 grams a year of purge costs about 10 dollars.

How much purge waste you really make

Purge waste from 3D printers includes failed prints, support structures, and filament changes. The amount depends on your printing habits, filament type, and printer settings. For example, a beginner using a 0.4 mm nozzle might generate 2 grams of purge waste per filament change. If you change filaments 5 times a week, that's 10 grams weekly. Over 52 weeks, that totals 520 grams - about half a 1 kg spool. At a planning assumption of 2.0 cents per gram, that's $10.40 annually (example planning assumption).

Material type also affects waste. PLA is easier to recycle, while ABS and PETG may require special handling. Even smaller amounts of waste can add up if you print frequently or use multiple filaments. Sorting waste by material helps with recycling programs, but it's not always necessary. The key is to estimate your waste first and choose a purge bin that matches your needs.

Use the filament cost calculator to estimate your annual waste cost. This helps you decide whether a simple desk-side bin or a multi-compartment container is better for your setup.

Purge bin classes: the criteria table

Purge bins fall into three main classes: mounted trays, desk-side bins, and sorted scrap containers. Each has its own advantages and considerations.

Class	Best for	Watch out for	Example planning numbers
Mounted trays	Printers with limited desk space	Limited capacity; may not fit all printers	2 g per filament change, 5 changes/week
Desk-side bins	Frequent filament changes or multiple users	Requires more desk space	10 g/week, 520 g/year, $10.40/year (example planning assumption)
Sorted scrap containers	Recycling programs or material-specific sorting	More complex setup; more to label	520 g/year sorted into 2-3 bags by material (example planning assumption)

Mounted trays are attached to the printer and catch waste directly. They're ideal for small setups but may not hold large amounts of waste. Desk-side bins are separate and more flexible, but they take up space. Sorted containers are best for users who recycle or sort waste by material, but they take more setup.

Always check your printer's frame for clearance. Some bins may block the printer's movement or interfere with the hot end. Fire safety is also important - keep bins away from the heated bed and hot end.

Mounted trays vs desk-side bins

Mounted trays attach to the printer and catch purge where it falls. They suit users with limited desk space or those who want a clutter-free setup. Their capacity is often small, so they need emptying more often on busy printers. Trays come in metal, silicone and plastic; whichever you choose, mount it only where the manual says the frame has clearance, and keep it clear of moving axes, the hot end and the heated bed.

Desk-side bins sit beside the printer and offer more flexibility. They work well if you change filaments often or run more than one printer, because a larger bin needs emptying less often. The trade-off is desk space, and you have to carry purge from the printer to the bin unless the printer ejects it.

Choose based on your workspace and printing habits. If you print often and have room, a desk-side bin is simpler. If space is tight, a mounted tray is more practical. Many beginners use both: a small tray to catch purge and a desk bin to empty it into.

Sorting scrap by material

Sorting purge waste by material helps with recycling programs and reduces contamination. Some filament types, like PLA, are easier to recycle than others, such as ABS or PETG. If your local recycling program accepts 3D printing waste, sorting by material ensures you're following their guidelines.

Sorted scrap containers are ideal for this. They often have compartments for different materials, making it easier to separate waste. For example, one compartment could be for PLA, another for PETG, and a third for failed prints. This helps you manage waste more efficiently and reduces the risk of mixing incompatible materials.

However, sorting isn't always necessary. If you don't plan to recycle your waste, a simple desk-side bin might be sufficient. Just be aware that some materials, like ABS, may release fumes when heated, so proper storage is important. Always refer to the filament maker's safety data sheet (SDS) for handling instructions.

Cutting purge waste with slicer settings

Adjusting your slicer settings can significantly reduce purge waste. For example, using minimal purge lines or retraction settings can minimize the amount of filament wasted during changes. Some slicers allow you to customize the length of purge lines, so you can set them to a minimum while still ensuring a clean transition between filaments.

Another tip is to avoid printing support structures unless absolutely necessary. Supports add extra material that's often discarded after printing. If you must use supports, use the lightest support style that still holds the part, and paint supports only where they are needed.

You can also adjust the skirt settings. A smaller skirt uses less filament and is easier to remove. On multi-material prints, a wipe or prime tower collects purge in one place; size it to the minimum your slicer allows, because a larger tower adds waste rather than removing it.

How much these adjustments save depends on your printer, slicer and printing habits, so compare the purge weight before and after. Always test new settings with a small print before committing to a large project.

How to pick by your printer setup

Your printer's size, location, and usage frequency determine the best purge bin class. For example, if you have a small printer in a tight workspace, a mounted tray might be the best option. It keeps waste contained and doesn't take up extra space. However, if your printer is large or you have a dedicated 3D printing area, a desk-side bin could be more practical.

Consider how often you change filaments. If you do it frequently, a larger bin with more capacity is better. For users who print infrequently, a small mounted tray might suffice. Also, think about whether you plan to sort your waste. If so, a sorted scrap container with compartments is ideal.

Finally, check your printer's frame for clearance. Some bins may not fit if the printer has a narrow base or limited space around the hot end. Always measure your printer's dimensions and compare them to the bin's size before purchasing.

Worked example: Estimating purge waste and cost

Let's say you're a beginner using a 0.4 mm nozzle and changing filaments 5 times a week. Here's how to estimate your annual purge waste and cost:

Purge per change: 2 grams (example planning assumption).
Changes per week: 5.
Weekly waste: 2 g x 5 = 10 grams.
Annual waste: 10 g x 52 weeks = 520 grams.
Filament cost per gram: 2.0 cents (example planning assumption).
Annual cost: 520 g x 2.0 cents = 10,400 cents = $10.40 (example planning assumption).

This example assumes a 1 kg spool costs $20.00, so 520 grams is about half a spool. At $20.00 per spool, the cost of waste is $10.40 annually (example planning assumption).

If you use a different filament type, like PETG, the cost per gram might be higher. Always check the filament cost per print calculator for accurate estimates.

Common mistakes

Not checking printer fit: Bins that don't fit your printer's frame can block movement or damage the hot end.
Ignoring material sorting: Mixing incompatible materials can reduce recycling options or cause contamination.
Overestimating capacity: A small bin may need frequent emptying, leading to clutter.
Not accounting for multiple users: Shared printers need bins that accommodate multiple users' waste.
Neglecting fire safety: Keeping bins near the hot end or heated bed increases fire risk.

Who this is not for

This guide is for US beginners using hobby 3D printers at home. It is not for commercial print farms, industrial-grade setups, or shops with formal waste contracts. If you need bins for large-scale production or have specific recycling requirements from a local program, follow that program's rules first; this page only covers choosing a simple bin class and estimating how much purge you make.

It is also not a fire-safety standard. Follow your printer maker's manual for clearances around the hot end and heated bed, never leave a printer running unattended, and keep scrap plastic away from heat sources.

FAQ

Q: How do I estimate my purge waste? A: Use the filament cost calculator to input your filament changes and cost per gram. Multiply weekly waste by 52 for annual estimates.

Q: What's the best purge bin for a small printer? A: A mounted tray is ideal for small printers with limited desk space. Ensure it fits your printer's frame and doesn't block movement.

Q: Can I recycle purge waste? A: Yes, if your local program accepts 3D printing waste. Sort by material and check the filament maker's safety data sheet (SDS) for handling instructions.

Q: How can I reduce purge waste? A: Shorten purge lines, use a smaller skirt, limit supports, and batch prints by color so you change filament less often. Weigh your bin before and after to see the difference.

Q: Are there fire risks with purge bins? A: Yes, keep bins away from the hot end and heated bed. Never leave a printer unattended, and follow common practice for fire safety.

Use the filament cost calculator to estimate your annual purge waste cost and find the right purge bin for your setup.

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