I crocheted this using 100% cotton yarn for spring and summer, purchased from DAISO. It is hand washable. The flower pattern is its main feature. The photos show a 0.48L Zojirushi thermos and a 600ml plastic bottle inside (these are not included). It does not have cold or heat retention properties. The dimensions when laid flat are: Height x Width = approximately 18 x 10 cm Bottom diameter: approximately 6.5 cm Handle length: approximately 22 cm Thank you for looking.