This is a set of 4 milk bottles. Plastic caps are included. They originally contained fruit-flavored milk. The brand is Yukijirushi, and the bottles are marked with "meg-snow." They have been washed in a dishwasher, but if you feel they are not clean enough, please sterilize them by boiling after purchase. The date on the cap cannot be specified. Height: Approximately 12cm Mouth diameter: Approximately 4.5cm Base diameter: Approximately 5cm - Quantity: 4 - Material: Glass - Caps: Plastic Thank you for looking.