Laundry Detergent Pods
I've never used laundry detergent pods before. I read up on them and I always wondered how they outer casing dissolves. Looking it up on wikipedia they use PVA which is highly water soluble as the outer casing. I used to assume they used Casein which pills use. Casein is only disolvable at higher water temperatures or non neutral pH. I am going to buy some pods soon and try them out.