That's what I do. I use the syringe and just pour my canned nutrition in it, and don't use the plunger. Takes a minute of two. I pour water first by holding syringe in one hand, other hand the water, then my canned nutrition, and water when I'm finished. I rinse out the syringe in water, refrigerate syringe in a plastic bag. I don't know about single use syringes, but I keep using my two plastic ones over and over for the past 4 years.
