Does anyone have any recommendations for a good small cooler? Requirements -- fits two pen-needles and stays cool either by plugging in overnight or by battery. My dd will be going on a ten-day mission trip. She will be staying in a place that has electricity, so she can recharge the cooler at night either with electiricity or by battery. She will NOT have access to a refrigerator. Also, she will be looking to keep both her lantus pen-needle and her humalog pen-needle cool, so I may be looking for two container cooling gizmos. (The A/C in this place is supposedly not good, though she obviously doesn't need to actually BRING her lantus with her during the day) Thanks -- I appreciate any and all suggestions!