Anyone using Polar Bear tubes?

I have our friendly newspaper delivery guy throw our daily paper on the lawn rather than the driveway. The papers are now in plastic sleeves rather than tied with string as back in the day. The undamaged plastic bag is great for making ice. Fill it with water, seal with a twist tie and stand in the freezer. When frozen, stand them up in the cooler and pack around them. They take up less space that a quart just and, as in our case, are taller. Best part is that when melted you have a thin bag to dispose of rather than a large plastic bottle.
It works for us.