Ditching Disposable Bags for Sous Vide: My Lekue Silicone Bag Test
If you're tired of wrestling with flimsy, single-use plastic bags for your sous vide cooking, this bag is designed to be a permanent solution.
The Lekue Reusable Silicone Bag aims to replace wasteful disposable bags with a durable, leak-proof, and versatile alternative. It’s built for home cooks who frequently use sous vide, store liquids, or just want to reduce their plastic consumption in the kitchen. I tested the 1000ml / 34 fl oz version to see if it lives up to the promises.
- Truly Leak-Proof Seal The ABS plastic slider creates an impressively tight, 100% leak-proof seal you can trust with soups, sauces, and marinades without a second thought.
- Built for Sous Vide Unlike many silicone bags, this one is explicitly designed and tested for sous vide cooking, holding its shape and integrity perfectly in a hot water bath.
- Easy to Clean, Hard to Dry While it’s dishwasher safe and simple to wash by hand, getting the inside of the thick silicone bag completely dry requires some patience and propping it open.
- Rigid Slider is a Pro and Con The slider is incredibly effective at sealing but requires significant hand strength to slide on and off, which could be a challenge for some users.
This platinum silicone bag features a 100% leak-proof ABS plastic slider, ensuring no water gets in or out during sous vide cooking. A perfect reusable alternative to disposable bags.
| Product | Lekue Reusable Silicone Bag (3400810B04U004) |
| Capacity | 1000ml / 34 fl oz / 4.25 cups |
| Bag Material | 100% Platinum Silicone |
| Slider Material | ABS Plastic |
| Seal Type | 100% Leak-proof Plastic Slider |
| Temperature Use | Fridge, Freezer, Microwave (defrosting), Sous Vide |
| Cleaning | Dishwasher Safe (bag only) |
| Features | Maximum fill line, writable labeling area |
- The ABS plastic slider creates a genuinely 100% leak-proof seal, perfect for soups and marinades.
- Stands upright on its own flat base, making it easy to fill without assistance.
- Thick, durable platinum silicone holds its shape well during sous vide cooking.
- Includes a clear maximum fill line to prevent over-stuffing for sous vide.
- Dishwasher safe for easy cleanup after messy jobs like storing sauces.
- Effectively replaces wasteful single-use plastic bags for multiple kitchen tasks.
- The plastic slider is very stiff and can be difficult to slide on and off, requiring significant force.
- Removing air for sous vide (water displacement method) is trickier than with thin plastic bags.
- The bag can retain odors from strong foods like garlic or onion if not washed immediately.
Choosing the right reusable silicone bag
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Seal QualityHighThe effectiveness of the seal is paramount, especially for liquids and sous vide. A failed seal can ruin a meal or create a huge mess.Look forDesigns with a separate, rigid sealing mechanism like a slider bar provide a more reliable leak-proof seal than a simple pinch-press closure.AvoidBags with thin, flimsy pinch-press seals that can pop open under pressure or when submerged.
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Material CompositionHighThe bag's material determines its safety, durability, and temperature resistance.Look for100% platinum silicone, which is food-grade, durable, and free from BPA, lead, and phthalates. It should be rated for a wide temperature range.AvoidLower-grade silicone or bags that don't specify their material composition, as they may degrade or impart flavors.
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Ease of CleaningMediumIf a reusable bag is difficult to clean, you won't use it. Design plays a big role in maintenance.Look forA bag that is dishwasher safe and has a wide opening. Rounded interior corners are a plus, as food is less likely to get trapped.AvoidBags with complex interior shapes, narrow openings, or non-dishwasher-safe materials.
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Versatility & Temperature RangeHighA good reusable bag should handle multiple kitchen tasks, from freezer storage to cooking.Look forClear specifications that the bag is rated for freezing, microwaving (at least for defrosting), and sous vide cooking.AvoidBags that don't specify their temperature limits, as they may warp or leach chemicals under heat.
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Structure and StabilityMediumThe bag's ability to hold its shape affects how easy it is to use, especially when filling with liquids.Look forA bag with a flat base that allows it to stand on its own. Thicker silicone generally provides better structure.AvoidOverly flimsy bags that collapse when you try to pour liquids into them.
Common questions
Is it hard to remove all the air for sous vide?
It’s different than with a thin plastic bag. You use the water displacement method, but because the silicone is thicker, you have to work a bit more to press the air out as you slide the seal closed. It takes a little practice, but you can get a very good vacuum for effective cooking.
Can the plastic slider go in the dishwasher or microwave?
No, the slider is made from ABS plastic and is not designed for high heat. You must remove it before placing the silicone bag in the dishwasher, microwave, or sous vide bath. The slider should be washed by hand.
Does the bag stain or hold onto smells?
With highly pigmented foods like tomato sauce or turmeric, slight staining is possible over time. Strong smells like garlic can linger if the bag isn’t washed promptly. A soak in a vinegar or baking soda solution usually helps remove stubborn odors.
How difficult is the slider to use, really?
It is very stiff, especially when new, and this is by design to create the leak-proof seal. It requires a firm, steady pull to remove and a good push to close completely. While it may get slightly easier with use, it always requires more effort than a standard zip-top bag.
The Lekue bag is a top-tier reusable option, especially for sous vide enthusiasts and anyone storing liquids. Its seal is genuinely foolproof, and the thick silicone construction is built to last. The only real caveat is the stiff slider, which is a direct trade-off for its incredible sealing power.
- Unbeatable 100% leak-proof seal for liquids and sous vide.
- Made from thick, durable 100% platinum silicone.
- Designed to stand upright on its own for easy filling.
For home cooks serious about sous vide or secure liquid storage, the Lekue bag is a worthwhile investment that pays off in reliability and waste reduction. If you can handle the firm slider, its performance is unmatched by flimsier competitors. It’s a premium, permanent replacement for disposable plastic bags.
