Featured in The Unplastic Shop, curated with the producers of The Plastic Detox to reduce your daily exposure to microplastics.
The EcoLunchBox Seal Cup Large is a round metal, plastic-free lunch container with a bright orange patterned silicone lid, displayed against a plain white background. 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 Large is a round stainless steel, leak-proof lunch box with an orange silicone lid. This Blue Water Bento container holds 20 oz (2 1/2 cups) and offers a plastic-free lunch solution. The Seal Cup Large by EcoLunchBox, a stainless steel lunch container, sits next to its round, textured orange silicone lid, creating a sleek, plastic-free set on a white background. A hand holds a round stainless steel, leak-proof lunch box with a bright orange textured silicone lid. Text at the bottom reads, Seal Cup Large by EcoLunchBox. Blurred greenery is in the background.
Beyond Plastic No Single Use Plastic
The EcoLunchBox Seal Cup Large is a round metal, plastic-free lunch container with a bright orange patterned silicone lid, displayed against a plain white background.

EcoLunchBox Seal Cup™ Large - Leak-Proof Food Container

20 oz

Why we love it

  • A high-impact upgrade for reducing plastic exposure in your daily routine.
  • Free from 3,000+ banned ingredients and meets our EU-informed standards.
  • Designed with the ocean in mind.
  • Perfect, leak-proof container for meals to-go.
  • Inspired by the natural texture of seashells.
$17.00 $17.00 Save 0%

Seal Cup™ Large - Leak-Proof Food Container $17.00

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

The Seal Cup™ Large is the perfect container for packing meals to-go.

The large Seal lunch box cup and all our Blue Water Bento collection lunch containers are designed FOR the ocean and BY the ocean. It's the beauty of our oceans that has inspired all our designs. Sneak a peek at the behind-the-scenes design process.

Since our leak-proof cup for lunch box is designed FOR the ocean and BY the ocean, it's the beauty of the nubby ridges found on seashells that inspired the texture of the seal lunch box's orange silicone lid.

Product Details:

  • Seal Cup Large container measures 4.75” diameter by 2.25” tall.
  • Capacity is 20 oz. (2.5 cups)
  • Tare weight is 4.4 oz
  • Tare weights are etched on the bottom of each container so they may be used at food bars and delis that charge by food weight
  • Non-toxic silicone lid and type 304 stainless container are free of estrogen-mimicking chemicals commonly found in plastics like BPA, BPS, and phthalates
  • All parts of this large lunchbox are dishwasher and oven safe. Not for use in the microwave
  • Steel and silicone container is lighter than glass containers and nonbreakable

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

More from The Unplastic Shop

Shop The Unplastic Shop
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