Hmm. Seems a bit noncooking to ask here but...

Just got a blender, sugar free coffee syrup. I make a block of ice in an
old salad/bbq chicken nugget container. Crush the ice in a blender, add
fruit a bit of coffee syrup maybe some more splenda, blend. Got something
cool to drink that is free of sugar except what is in the fruit.

Problem: Just chucking in the block of ice doesn't work. Breaking it into
four or five big pieces doesn't work. Ok so I pulverize the ice before
putting it in the blender, no biggie. just put said block of ice in a bag
put a thick hardcover on top and wail on the hardcover with a meat
tenderizer. ( Makes more uniform chunks. )


Problem is that the usual suspects: zip lock bags don't work. Been there
done it, they tear. Saw something online for the job a thick vinyl bag
but expensive as hell. Also something called a lewis bag. That too is
expensive.

Can someone suggest cheap bags?

Thanks and sorry for being so mundane.