I just thought I'd share -
I remember when I gave birth in the hospital, one of the nurses packed a newborn diaper full of ice & gave it to me for my sore perineum.
This time around I filled condoms with 3 parts water & 1 part rubbing alcohol, tied them up & froze them. The alcohol keeps them from becoming solid, so you have a slushy ice pack. Then take the newborn size diaper & open it up like a chip bag on the tab end. Stuff in the condom & you have a absorbable ice pack! Perfect sized for the sore parts.