I usually order from american allergy, but thought I'd try some place different this last time and did a search for the cheapest neb cups, cheapest shipping and found a seller on Amazon AAA something or other. I got 4 neb cups in a timely manner -- unfortunately, I ordered 5. I emailed them and they said they'd send out the other one right away and I got a bigger package in the mail -- tubing for a respiritonics (sp) cpap system. Ugh!