Short answer: buy the IRIS WeatherPro 19 Qt if you want the cleaner default for one active spool plus room for desiccant, a hygrometer, or a second smaller accessory without turning the bin into a tight squeeze. Buy the Sterilite Gasket Box 20 Quart if your main priority is a cheap basic sealed bin for one to two rolls and you care more about keeping costs low than about picking the bin people most often build a dedicated filament-storage workflow around.
These two bins belong in the same comparison because they solve the same real problem: you want a small sealed storage lane for filament that is simpler than vacuum bags and cheaper than purpose-built dry boxes. For a lot of makers, especially people storing PLA, PETG, TPU, or a couple of partially used engineering spools off the printer, this is the first meaningful storage upgrade that actually sticks.
What each bin is really trying to be
The IRIS WeatherPro 19 Qt is the more established filament-bin pick. It makes sense when you want a modular small-box system, cleaner stackable storage, and enough room to build a repeatable desiccant-plus-hygrometer workflow without feeling like every spool change is a puzzle.
The Sterilite Gasket Box 20 Quart is the value-first alternative. It sits in almost the same small-bin lane, but the appeal is simpler: if you want a gasketed container for loose spool storage and do not need a purpose-built reputation around filament setups, it is the cheaper practical path.
Buy the IRIS bin if...
- you want the safer default for a one-to-two spool sealed-storage setup
- you care about building a cleaner modular storage system instead of buying whatever bin is merely close enough
- you plan to pair the box with desiccant and a compact hygrometer and want a little easier working room
- you may add more matching bins later and want the first purchase to set that pattern
Buy the Sterilite bin if...
- you mainly want the cheapest respectable small gasketed bin for filament
- you are testing whether sealed storage even matters in your workflow before you standardize on one box style
- you only need a simple one-bin answer for a couple of active rolls
- you do not care much about the most common enthusiast pick as long as the box seals and stays organized
Where the real difference shows up
The honest split is not dramatic performance. These are both storage bins, not dryers. The difference is how polished the workflow feels after you load them. The IRIS bin is easier to recommend as the more intentional filament-storage choice because it already has a track record in maker setups and it fits the modular-box mindset better.
The Sterilite bin is easier to recommend when the buyer is price-sensitive and just wants a clean off-printer sealed container without turning the decision into a hobby inside the hobby.
Which one is better for common use cases?
One active spool plus desiccant and a hygrometer
The IRIS WeatherPro 19 Qt is the cleaner pick. That is its sweet spot.
Two everyday rolls stored between print sessions
Both can make sense, but the Sterilite Gasket Box 20 Quart is easier to justify if budget is the main filter.
Building a matching stack of small filament bins over time
The IRIS bin makes more sense because it is the more natural modular-system choice.
First sealed-storage experiment before spending more on drying gear
The Sterilite bin is the easier low-risk starting point if you just want to see whether basic sealed storage improves your day-to-day spool condition.
What neither one does
- neither bin actively dries wet filament the way a real dryer does
- both still work best when paired with desiccant instead of used empty
- both are better framed as storage and humidity slowing tools, not miracle recovery devices for already-soaked nylon or TPU
Final take
The IRIS WeatherPro 19 Qt is the better default pick for makers who want a cleaner, more intentional small-bin filament storage system. The Sterilite Gasket Box 20 Quart is the better value pick for buyers who just want a cheap sealed box that covers the same basic one-to-two spool lane.
If you already know you like modular storage and want the bin choice most likely to stay in the workflow long term, pick IRIS. If you are still proving out the habit and want the lower-cost entry point, pick Sterilite.