Every grinder shopper hits the same fork in the road: spend about $15 on a plastic grinder, or about $60 on aluminum? Both grind. Both have four pieces, a screen and a kief catcher. So what are you actually paying for, and is the upgrade worth it for you?
We make both, so we'll give it to you straight: neither one is "better" across the board. They're built for different people. This guide compares them on the things that matter day to day, then helps you pick.
The quick answer
- Pick plastic if you want a light, low-cost grinder for everyday use, travel, or keeping a spare in a few places. It's also the smart buy if you lose things.
- Pick aluminum if you want one grinder that lasts for years, has a heavier and smoother feel, and looks like a premium piece on the table. It's also the better gift.
Side-by-side comparison
| Plastic (Large 4-Piece) | Aluminum (Large 4-Piece) | |
|---|---|---|
| Price | $14.99 (or $10/each in a 6-pack) | $59.99 |
| Material | Food-safe, BPA-free polypropylene | Aircraft-grade aluminum, matte anodized |
| Size | 2.4" × 3.8" | 3.1" × 2.5" |
| Weight and feel | Light, easy to carry | Heavier, solid, smooth turn |
| Teeth | Diamond-cut | Diamond-cut metal teeth |
| Lid | Magnetic | Magnetic |
| Kief catcher | Yes, with built-in scraper | Yes, with scraper |
| Colors | 10+ | 9 |
| Warranty | Lifetime on the teeth | Lifetime on the teeth |
Durability: what actually wears out
This is the biggest difference. Aluminum handles years of daily use, drops and being tossed in a bag. The anodized finish resists scratches and fading, and the threads stay smooth.
Plastic is tougher than most people expect. Ours is polypropylene, not the brittle acrylic used in cheap gas-station grinders, so it doesn't crack easily and it won't rust or dent. But plastic threads and edges will show wear sooner than metal if you grind several times a day.
On both, the part that matters most, the teeth, is covered by the same lifetime warranty.
Grind quality
Both use diamond-cut teeth, so both shred cleanly instead of crushing. The difference is in the feel. Aluminum is heavier and more rigid, so it turns with less flex and tends to give a slightly finer, more consistent grind with fewer turns. Plastic gives a fluffy, even grind that's great for everyday use, with a lighter turn.
For either one: don't overfill the top chamber, and twist 6–8 times in alternating directions. Overloading is the #1 cause of a chunky grind on any grinder.
Weight and portability
Plastic wins here. It's noticeably lighter, which makes it the better pick for a bag, a car or travel. The magnetic lid keeps it shut in your bag either way.
If you want the most portable option, the Mini plastic 4-piece is 1.5" × 2.5" and fits in a pocket.
Price and value
The plastic Large is $14.99, and the 3-pack ($34.99) and 6-pack ($59.99) bring it down to about $10 each. For the price of one aluminum grinder you can keep a plastic one at home, in the car and in your bag.
Aluminum costs more up front, but if you grind every day and keep it for years, the cost per use ends up very low. It's a buy-once purchase.
Cleaning and care
Plastic: brush out the teeth and screen after use. For a deep clean every few weeks, take it apart and hand-wash with mild dish soap and lukewarm water, then let every piece dry completely before reassembling.
Aluminum: brush out debris regularly. For a deeper clean, take it apart and soak or scrub the pieces, then dry thoroughly. Keep the threads clean and dry so they keep turning smoothly.
For a full walkthrough, see our guide on how to clean a grinder (plastic and aluminum).
Which one is right for you?
Go plastic if you…
- Want a solid grinder without spending much
- Travel a lot or carry your grinder daily
- Want spares in more than one place
- Are buying your first 4-piece grinder
Go aluminum if you…
- Grind every day and want something that lasts for years
- Like a heavier, smoother, premium feel
- Want a grinder that looks good on display
- Are buying a gift
Plenty of people end up with both: an aluminum grinder at home and a plastic one in the bag.
FAQ
Is aluminum or plastic better for a grinder?
Aluminum is more durable and has a premium feel. Plastic is lighter and much cheaper. Both grind well when they have sharp, diamond-cut teeth.
Are plastic grinders any good?
Yes, if they're made well. Look for polypropylene (not brittle acrylic), sharp teeth, a magnetic lid and a kief screen. Cheap plastic grinders often skip these.
Do aluminum grinders give a finer grind?
Usually slightly finer and more consistent, because the heavier, rigid body turns with less flex. Technique matters too: don't overfill and twist in both directions.
How long does an aluminum grinder last?
With basic cleaning, years. Ours also carries a lifetime warranty on the teeth.
Do HerbSaver plastic and aluminum grinders have the same warranty?
Yes. Both are covered by our lifetime warranty on the teeth.
Ready to choose? Shop the Large plastic 4-piece ($14.99) or the Large aluminum 4-piece ($59.99), or compare every option in our best grinder buyer's guide.
Shop HerbSaver
- Weed grinders & herb grinders – every HerbSaver grinder in one place
- 4-piece grinders with kief catcher – grind, sift and collect kief
- Plastic grinders – light, BPA-free, from $6.99
- Aluminum grinders – aircraft-grade metal herb grinders
- Grinder screen replacement – replacement kief screens for the Large HerbSaver