Featured in The Unplastic Shop, curated with the producers of The Plastic Detox to reduce your daily exposure to microplastics.
The EcoLunchBox Seal Cup XL is a stainless steel lunch box with a teal silicone lid. It’s plastic-free, ocean-friendly, and leak-proof—perfect for eco-conscious food storage. Text graphic reads: The Unplastic Shop. Curated by the Oceanic Preservation Society — the production team behind The Plastic Detox, now streaming worldwide — to reduce plastic exposure where it matters most. The EcoLunchBox Seal Cup XL, a stainless steel food container with a blue silicone lid, holds 26 oz (3 1/4 cups) of food—an ideal plastic-free lunch solution. The EcoLunchBox Seal Cup XL, a stainless steel lunch box with a blue silicone lid, rests on mossy stone outdoors against blurred trees—an ideal plastic-free container for eco-friendly meals. An EcoLunchBox Seal Cup XL holds fresh kale, sugar snap peas, and dried cranberries on a blue plaid cloth. Beside it are a small jar of creamy dressing, a handful of pecans, and the Seal Cup’s yellow and blue lid.
This product contains durable, reusable plastic, defined by the EPA as lasting 3 years or more. There is no single-use plastic.
The EcoLunchBox Seal Cup XL is a stainless steel lunch box with a teal silicone lid. It’s plastic-free, ocean-friendly, and leak-proof—perfect for eco-conscious food storage.

EcoLunchBox Seal Cup™ XL - Leak-Proof Food Container

26 oz

Why we love it

  • Free from thousands of banned ingredients and meets our EU-informed standards.
  • Made with durable 18/8 stainless steel and a no-leak silicone lid.
  • Excellent for carrying wet foods to school work or the outdoors.
  • Reusable container helps reduce reliance on polluting materials.

$23.00

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Free carbon neutral shipping on orders $29+. Arrives in 3-5 days. Free, easy 30-day returns.

The Seal Cup XL food container is ideal for packing wet foods to go. Whether you're heading to school, the office or into the great outdoors, this container is a durable, nonbreakable food container for many occasions.

Made from 18/8 stainless steel, the Seal Cup XL features a dark teal no-leak silicone lid embossed with a tidepool design. It's part of our Blue Water Bento collection of containers designed to celebrate our oceans and inspire us all to reduce our dependence on plastics that are polluting our planet. The durable and non-breakable Blue Water Bento containers by ECOlunchbox all feature colorful lids embossed with ocean motifs.

Product Details:

  • This stainless steel container with no-leak silicone lid hold 26 oz. (3.25 cups)
  • Measures 6 inches in diameter by 2.75 inches tall
  • Container's space-saving design nests and stacks for compact storage
  • Non-toxic silicone lid and type 304 18/8 stainless container are free of estrogen-mimicking chemicals commonly found in plastics like BPA, BPS and phthalates
  • Tare weight is etched on the bottom so food container may be used for bulk shopping and at prepared food bars. Two weights are provided - for the base of the container alone as well as with the lid on it
  • All parts are dishwasher and oven safe
  • Not for use in the microwave
  • This steel and silicone container is lighter than glass containers and non-breakable

Container: Food-Safe 18/8 Stainless Steel 304 No-Leak Lid: Silicone

All parts of this large lunchbox are dishwasher and oven safe. Not for use in the microwave
This product contains durable, reusable plastic, defined by the EPA as lasting 3 years or more. There is no single-use plastic.

Let’s end the plastic era for good.

This product contains durable, reusable plastic, defined by the EPA as lasting 3 years or more. There is no single-use plastic.

Go Beyond Plastic

Grove Values

More from The Unplastic Shop

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A collection of eco-friendly household items including a metal lunchbox, reusable bamboo utensils, toothpaste tablets, bamboo toothbrush, dish scrub, cleaning cubes, dish soap, and colored pencils, all arranged on a wooden board.
The unplastic shop

Curated to reduce plastic exposure where it matters most

Everything in this shop meets expert-backed criteria developed with the Oceanic Preservation Society — prioritizing reduced plastic where it counts most.

✓ Plastic never touches anything you ingest

✓ Free from BPA and all “BP” alternatives

✓ Free from PFAS and other “forever chemicals”

✓ Selected to avoid endocrine-disrupting chemicals (EDCs) and other chemicals associated with hormone disruption

Download the Standards