Marna, a manufacturer of household goods, has released a "bottle washing sponge" that can remove tea stains with just water, and it has been on sale since January 24.

Marna Bottle Washing Sponge

This sponge is made of acrylic material with Marna's unique "hard resin treatment" on the surface. It is said to be able to remove tea stains with just water, without using detergent.


The handle and sponge surface are antibacterial and hygienic. The stiff sponge is sandwiched between the handle from both sides, making it easy to wash with force, and the sponge part is replaceable.


It comes in two sizes: slim and wide. The "Bottle Wash Sponge Slim" is designed for bottles with a mouth diameter of 31mm or larger, and is easy to wash thin bottles and glasses. The "Bottle Wash Sponge Wide" is designed for bottles with a diameter of 45mm or larger, and can be used to wash wide mouth bottles and cold water bottles. Replacement refills (2 pieces) are also available.

Marna Bottle Washing Sponge Slim

Price: 650 yen (715 yen including tax)
Material: handle/polyacetal, sponge surface/acrylic (hard resin finish), sponge/polyurethane
Size: approx. 35 x 316 x 31 mm

Marna Bottle Washing Sponge Wide

Price: 680 yen (748 yen including tax)
Material: handle/polyacetal, sponge surface/acrylic (hard resin finish), sponge/polyurethane
Size: approx. 55 x 321 x 31 mm

Marna Bottle Washing Sponge Slim Refill

Price: 380 yen (418 yen including tax)
Material: sponge surface/acrylic (hard resin processing), sponge/polyurethane
Size: approx. 35 x 85 x 30 mm

Marna Bottle Washing Sponge Wide Refill

Price: 380 yen (418 yen including tax)
Material: sponge surface/acrylic (hard resin processing), sponge/polyurethane
Size: approx. 55 x 90 x 30 mm