I have been filling up a large cup, glass, mug, whatever I can find @ night right before I go to bed with crushed ice from door of the fridge. I fill it to the rim and then fill it with water. I usually take a few chews and then go to bed. In the morning the cup is waiting; nice and cold & the ice is softer and easier to chew. I take that cup with me to work or chew it all up before leaving for work and fix another to take on the go. I also fill up another cup with ice and water and put it in fridge for when I get home from work. It is nice to have it cold and soft and ready when I walk in the door.
I am going out of town this weekend and can't wait to get some Sonic Ice, we don't have a local Sonic.