Use a Flip Top Cap from a Vitamin Bottle over a plastic bag to seal dry ingredients. I have other flip top bottle and jar caps from parmesan cheese and coffee creamer that would probably work as well. From TipNut
Recycled coffee creamer bottled filled with rice. Glue lid and paint bottles solid color and then second coat with sparkle paint...presto!! Instant "brain sprinkles!" My daughter made these for her economics fair at school
Reuse the empty coffee creamer bottle to hold water for refilling the Keurig reservoir. It sits perfectly beside a Keurig coffee maker that's placed on a K-Cup storage drawer. The cap keeps the water clean, and it's an efficient way to keep a handy refill supply - especially if your coffee center is not next to your sink.
I try to find uses for containers that seem too good to just throw away. These cleaned out coffee creamer bottles are perfect for day trips in a cooler because of their size, easy pour spout into sippy cups and tight fitting lid. And, I don't feel guilty tossing them after one use because I'll have more by our next trip.