Fish bags for the hot weather

[JFC1]

Does anyone have recommendations for a not too expensive fish bag for back bays and beaches?  It doesn't have to be insulated if it's waterproof and backpack style straps would be a plus.  I just bought an insulated one but it's like carrying a banjo and I tend to walk long distances through brush etc.   Any suggestions welcome now in the hot weather. Thanks. 

[CapeCod]

Sometimes I use these Hot/Cold bags. I get them at Shoprite. Light weight, cheep and disposable.