Dang, why didn’t I think of this?
A piece of 1/4” sheet steel with rounded corners for $55.
It’s nearly on par with water in a plastic bottle for $1.79.
But the plastic bottle is recyclable.
Not sure, if I should leak my million dollar idea or not. I invented instant water. It comes in light weight envelops. It's great for hiking, backpacking, camping, and all kinds of outdoor activities when you don't want to carry plastic water bottles. Simply open a packet, and pour 16 oz. of water into a drinking container. No waiting. No stirring. No mixing. Instant water. It's cheaper than your typical plastic water bottle from a convenience store, only $0.89 per packet. Each packet makes 16 oz. of instant water.