Selllng Chocolate in the summer

Hello All.  This will be my second summer in business and last summer I pretty much discontinued my chocolate sales (I sell ice cream also).  I'd like to keep making / selling throughout the summer but I'm not sure how to ensure that my customers can get the chocolate home, without melting.  I live in Philadelphia and the temperatures stay in the 90's (f) for much of the summer.  Is there a relatively easy and inexpensive way to transport chocolate for small distances during hot summer months?  Thanks for the help, John

Get some little insulated bags with your branding on them - have the really tiny little ice packs available.  

Thanks Kerry.  I'll try that.  John

Hello again, Kerry.  Someone in another thread recommended Bubble Wrap bags.  What type of insulated bags do you use, and who Brands them for you?  Also, the small ice packs you referred to - not sure what they are.  Thanks again for the help.  John

What we normally do is put our boxes in ziplock bags and transport them in a cooler. During very hot days we put blue ice bags in the cooler too (but outside the ziplocks obviously).