The carton size and built in spout that extends about 8 inches makes pouring the anti freeze easy without the need for a funnel.

This box is a GOD-SEND for an RV that requires antifreeze to be poured into fresh water tank to winterize. 2.5 gallon bag is WONDERFUL with the flexible spout that comes with it. Extend hose, insert into tank neck and puncture a tiny hole in bag and will drain in less than a minute. I did 2 bags in less than 4 minutes. I had a gallon jug and it took 5 minutes for that one gallon. Made the job SO EASY!

I thought this would be perfect for winterizing my motorhome. It's a perfect size and I appreciate TSC's attempt to minimize plastic waste. But it's designed only to pour out through their convenient "FunLPour" spout which is too small to fit a garden hose into. If you winterize by pouring the antifreeze into your water system, this will work great. But if your system sucks it out through a pump (like mine), the funnel system is just in the way. The only way to use it is to cut the spout completely off. It would be great if there was a way to easily remove the spout and insert a hose. The antifreeze itself seems fine though.

Convenient size to winterize RV sustem as wakk as power washer. No need to use multiple 1 gallon containers. Slightly more economical too.