This pouch uses a cooling sheet on the inside ✾ It's convenient for use with ice packs, ice ring cases, easily melted snacks like chocolate, and juice!!! It uses a washable aluminum thermal insulation/cooling sheet. Please wash gently in a laundry net. (Do not use a dryer) The strap has a snap, so you can hang it on your bag ◎ (※See image 4) It's made without a gusset so it won't take up much space in your bag or school bag! 【Size】 20 x 18cm (no gusset) Handle: 19cm (It's sized to fit an ice ring L size ※See image 5) 【Color/Pattern】 Green/Vehicle pattern