New trunk for revived Schwinn

The revived Schwinn Loop, our folding bike, needs to have a trunk, so I don't need to switch my trunk between my Novara and the  Schwinn.   What can I use for that? 

Well, Mr. WhP lost a good old fishing friend moving away, so his water cooler was resting on the shelf.
Mrs. WhP made a new trunk with Velcro sewed for the Schwinn. 

The trunk's color fit with the Schwinn very well, so I'm very happy about that.  But it's so big, and after I put my bike lock and water bottle it got quite heavy.  

I got exhausted riding 7.5 miles this morning, and I couldn't understand why.  Then I realized it was the weight.

That bike will be a good training bike for me.