rust in spray bottle

I have a new 2-ounce spray bottle for MMSA skin spray. I only fill it half way. The metal spring inside the spray tube is already rusty from the MMSA passing over it when spraying. Is it okay to continue using the spray bottle? Anyone know of a spray bottle that has the spring outside of the tube?

I bumped into that problem as well - with nasal spray bottles (bought locally - then dump the crap out) I now use nasal spray bottles that you squeeze to spray - no metal spring.

I use 4 oz spray bottles from wps4sale. They don't advertise that the springs don't rust - but they don't. The down tube does eventually go brittle and break but they last for months.

www.wps4sale.com/SPD/spray-bottle--empty--spray-bottle--empty---ia1378955366473.jsp