Is LocknLock containers dishwasher safe?
Sometimes — the Tritan or polypropylene body is top-rack safe, but the lid and silicone gasket should be hand washed to prevent seal degradation and warping.
Quick facts
| Dishwasher safe? | Sometimes — Sometimes — with care |
|---|---|
| Category | Containers |
| Source | AI-reviewed · manufacturer guidance & material science |
| Last checked | 2026-07-28 |
Why
LocknLock containers are typically made from Tritan (a BPA-free copolyester) or polypropylene (PP) for the body, with a silicone or LDPE gasket in the lid. The body material is generally dishwasher safe on the top rack, but high heat and alkaline detergent can cause clouding/etching over time, especially on Tritan. The lid contains a silicone gasket that can degrade, lose elasticity, or trap odors and stains in the dishwasher. The manufacturer recommends placing containers on the top rack only and hand washing lids to preserve the seal. Repeated machine washing may also cause the lid to warp slightly, leading to poor sealing. The gasket should be removed and hand washed to avoid permanent deformation.
How do you wash LocknLock containers?
- Disassemble the lid by pulling out the silicone gasket.
- Hand wash the gasket with mild soap and warm water, then air dry.
- Place the container body on the top rack of the dishwasher, away from the heating element.
- Use a gentle cycle with low heat and avoid high-temperature drying.
- Hand wash the lid (without gasket) or place it on the top rack only, but hand washing is preferred.
- After washing, allow all parts to air dry completely before reassembling.
- Reinsert the gasket only when both lid and gasket are fully dry.
What happens if you put LocknLock containers in the dishwasher?
If you put a LocknLock container in the dishwasher repeatedly, the body may develop a cloudy or etched appearance due to the alkaline detergent and heat, especially if placed on the bottom rack. The silicone gasket will gradually lose its flexibility, leading to a poor seal and potential leaks. After one wash, you might notice minor clouding on clear Tritan bodies. After many washes, the lid may warp slightly, making it difficult to snap shut properly. The damage is primarily cosmetic for the body but functional for the lid and gasket, as the container may no longer be airtight. Hand washing the gasket and lid can prevent these issues entirely.
Frequently asked questions
- Can LocknLock containers be used in the microwave?
- Yes, most LocknLock containers are microwave-safe, but remove the lid before microwaving to avoid pressure buildup. The body can withstand temperatures up to 100°C (212°F).
- Are LocknLock containers freezer-safe?
- Yes, they are freezer-safe down to -20°C (-4°F). The flexible silicone gasket remains effective at low temperatures, but avoid overfilling to prevent cracking.
- How often should I replace the silicone gasket?
- Replace the gasket every 6-12 months or when it becomes loose, cracked, or no longer seals tightly. You can purchase replacement gaskets from LocknLock.
- Can I put LocknLock containers in the oven?
- No, LocknLock containers are not oven-safe. They are designed for microwave, freezer, and dishwasher use only, and can warp or melt at oven temperatures.
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Last updated 2026-07-28. General guidance — always check your product’s care label. How we verify · Dishwasher care guides.