I recently purchased 2 10 drink coolers as shown below. I do small batches so my kegs are 2.5 gallons. I'm going to use sodastream for dispensing the beer. Is it better to strap it to the outside or have it inside? In side will be cold but I figure that's OK - I keep my 51b CO2 in my chest freezer set at 38 degrees. Would it be too hot in the summer to have the sodastream on the outside of the cooler? I'm in NJ and it gets into the 90s.