Featured in The Unplastic Shop, curated with the producers of The Plastic Detox to reduce your daily exposure to microplastics.
A round EcoLunchBox Seal Cup Jumbo stainless steel container with a purple silicone lid, partially open, is shown. The label promotes it as a leak-proof, plastic-free, and ocean-friendly lunch container. 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 Jumbo, a stainless steel container with a decorative purple silicone embossed lid, sits on a white surface. This leak-proof lunch container combines style and practicality. The EcoLunchBox Seal Cup Jumbo is a stainless steel, leak-proof lunch container with a purple silicone lid, holding 51 oz (6 1/3 cups). It's ocean-friendly—ideal for packing eco-conscious meals on the go. An EcoLunchBox Seal Cup Jumbo stainless steel container filled with poke ingredients—diced fish, avocado, seaweed salad, radish, kimchi, green onions, and sesame seeds—held above a purple surface with a patterned stone walkway in the background.
Beyond Plastic No Single Use Plastic
A round EcoLunchBox Seal Cup Jumbo stainless steel container with a purple silicone lid, partially open, is shown. The label promotes it as a leak-proof, plastic-free, and ocean-friendly lunch container.

EcoLunchBox Seal Cup™ Jumbo - Leak-Proof Food Container

51 oz

Why we love it

  • Free from 3,000+ banned ingredients and meets our EU-informed standards.
  • Made from durable 18/8 stainless steel.
  • Helps reduce dependence on polluting materials.
  • No-leak silicone lid with fun ocean motif.
$27.00 $27.00 Save 0%

Seal Cup™ Jumbo - Leak-Proof Food Container $27.00

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

The Jumbo, which holds 6 cups (48 oz), is the largest in our nesting Seal Cup containers set, which includes 6 sizes: Mini, Small, Medium, Large, Extra Large and Jumbo.

Made from 18/8 stainless steel, the Jumbo features a purple no-leak silicone lid embossed with an octopus-inspired ocean motif. 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 containers all feature colorful lids embossed with ocean motifs.

Product Details:

  • This large no-leak stainless steel container with silicone lid holds 6 cups (48 oz)
  • Container measures 7 inches diameter by 3 inches tall
  • 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
  • Container's space-saving design nests and stacks for compact storage
  • 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

Grove Values

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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
A flat lay of powdered ingredients, gummy candies, a glass of pink liquid, a gold spoon with powder, and a container with an orange slice label, all on a pastel green background.

Grove Collaborative

10,000+ ingredients reviewed. 3,000+ banned outright.

Our most comprehensive standards yet — across your whole home.

Explore Our EU-Informed Ingredient Standards