I'm always looking for ways to save money.
Check your vending machine prices for soft drinks. I bet they are high.
At my work, they charge $1.25 for a 20 oz. bottled drink. I watch the sale ads, and buy 2 lts. on sale for $1.00. They make fun of me caring in a 2 lt., but I'm the one laughing at how much they are spending.