• A purple SpongeMail Mystery 6-Pack box stands on a light wood surface next to a stack of white postage-stamp-shaped compressed cellulose sponges, and 6 which are expanded.
  • Promotional graphic for a SpongeMail sponge featuring award text, product callouts, and a New York Design Award Silver badge. The image shows several sponge samples with feature callouts including 100% cellulose and microplastic-free material, 2x thickness of traditional sponges, fade-to-replace designs, scalloped edges, fast drying, limited editions, and the New York Design Award Silver 2025 winner badge.
  • A product infographic for a London Design Award Silver Winner cellulose kitchen sponge. The image shows a rectangular cellulose sponge printed with a 'Great Lakes' landscape design, demonstrating its expansion feature with a second piece shown underneath
  • A stamp-style art print featuring Hokusai's Great Wave off Kanagawa, shown on a white background with award text reading 'Muse Design Award: Silver' and a silver award badge. A circular inset highlights the print's wave detail, and text notes 'Archival-Quality Prints'.
  • Four postage-stamp-style art prints fanned out on a white background, featuring Hokusai's Great Wave off Kanagawa, Van Gogh's Starry Night, Leonardo da Vinci's Mona Lisa, and Van Gogh's Sunflowers. Text reads 'The Complete Art Series.
  • A blue rectangular box labeled 'SpongeMail Mystery 6-Pack' with white decorative text and ornamental borders, placed on a light wood surface.
  • A purple box of SpongeMail Mystery 6-Pack compressed cellulose sponges, shown open on a light wood background. The box features gold decorative borders and text, with several colorful sponges visible at the top.
  • A purple SpongeMail Mystery 6-Pack box stands on a light wood surface next to a stack of white postage-stamp-shaped compressed cellulose sponges, one of which is expanded to show a sunflower design.
  • Back of the purple spongemail 6-pack packaging Showing that the sponges are made from 100% cellulose(wood pulp) and QR code to restock your favorite designs
  • Purple and gold spongemail box open showing colorful designs coming out the top surrounded by various designs that may be found in the mystery pack
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Underdog Kitchen Company

SpongeMail® 4-Pack | Plastic-Free Cellulose Kitchen Sponges

SpongeMail® 4-Pack | Plastic-Free Cellulose Kitchen Sponges

$14.95 USD
$14.95 USD $14.95 USD
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Design

SpongeMail® 4-Pack

Four award-winning compressed cellulose SpongeMail® sponges with rotating designs at. Plant-based sponge that expands with water. Designs are based on the selected theme with one mystery design. Limited editions.

  • 4 compressed cellulose kitchen sponges (expand with water)
  • 100% plant-based cellulose (wood pulp)
  • Super absorbent and fast drying. Non-scratch for dishes, counters, and surfaces.
  • Fade-to-Replace design indicating when to replace.
  • One mystery design!
  • Scan to Restock other designs when you are ready for more.

Four SpongeMail compressed cellulose sponges.

This 4-Pack is a curated themed set. Your box will include designs from your selected theme.

Every sponge is:
• 100% cellulose (wood pulp), 100% plant-based
• Expands with water (rinse thoroughly to expand)
• Expanded size about 2.4 x 4 x 1.4 in (6.1 x 10.2 x 3.6 cm)
• Super absorbent and fast drying
• Fade-to-Replace technology
• Long-lasting and non-scratch for everyday dishes, counters, and surfaces

How to use:
1. Rinse thoroughly with water to expand.
2. Use on dishes, counters, and surfaces.
3. Rinse and squeeze after use so it dries faster.
4. Experts recommend replacing every 1-2 weeks for optimal hygiene depending on use.
5. Scan to Restock when you are ready for more.

Why people love SpongeMail®: watching a flat compressed sponge bloom in water is half the fun. Open the pack, expand one, and see which prototype print you got.

Underdog Kitchen Companys SpongeMail is the plant-based, fade-to-replace sponge line. Product-line awards named on our site FAQ include Silver awards from the NY Product Design Awards, London Design Awards, and Muse Design Awards, plus an Honorable Mention from the IDA International Design Awards. Those awards describe the sponge innovation.

Finally a sponge worth talking about.

Price: $16.95. Free shipping on orders over $50 so bundle and save on shipping. If you are not happy within 30 days of purchase, you get your money back.

Not a toy. Keep out of reach of children under 3. Do not put in the mouth. Expands with water.

Frequently Asked Questions:

What designs will I get?
You get the theme based on your variant selection upon purchase. New designs and themes will be added.

What is the quality of the sponges like?
Every sponge is SpongeMail compressed cellulose with the same expand, absorb, dry, and Fade-to-Replace behavior described on the pack. Many people love how thick and robust they are.

Can I choose designs?
Yes, we have different themes based on your interests and are planning on adding more over time. If you would like to request a theme, let us know.

Do you offer free shipping?
Yes. Free shipping on orders over $50.

How do I expand them?
Rinse thoroughly with water.

How often should I replace?
After 1 to 2 weeks for hygiene (based on what hygiene experts and studies recommend).

Is this pack limited?
Yes, quantities are limited, and once it sells we may or may not continue it based on your feedback.

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