I’m currently using Princeton double layer and I feel it’s good. But I do bring frozen ice pack out as well. https://sg.shp.ee/qVKos7X
Can try vcool! They have flash deals + can stack vouchers so you can get quite a good deal ✌🏻 https://s.shopee.sg/10k487kLqL
Packit is good! There’s a few sizes. I’m using this size https://s.shopee.sg/701GpozmnT It has built in ice packs
can try packit