The screw-type lid closes securely so you can carry a wet towel with peace of mind. Great for excursions, sports meets, picnics, etc. Formulated with silver ions "Bakutteller(R)" (antibacterial treatment: case body and lid). Gakken Picture Book LIVE: This is a new type of visual illustrations published by Gakken Plus. This is an illustrative book that pursues realism from ARs 3DCG experience, publishing life-size photos and DVDs from documentary videos, etc. (C) Gakken Size: (Case Size) Approx. Diameter 2.5 x Height 3.6 inches (6.3 x 9.1 cm); (Towel) Approx. 12.6 x 11.4 inches (32 x 29 cm); (Weight) Approx. 2.0 oz (56 g); Heat Resistant Temperature: 28.9 °F (140 °C) (Antibacterial and Soil) Cotton (Towel Case). China (Hot Towel) towel)