I've logged in (to Drugstore.com) on both Chrome and Firefox and it tells me this offer not available. I tried putting it in my cart and it still wants $4.99 at checkout.
I'm in. Worked for me + I got another 2 free samples. You search for "promotions" then click on "Freebies" then choose your 2 free samples ($1.49 value each!)
Unfortunately, this special offer is only available to selected customers of the drugstore.com store. If you believe you have reached this message in error, please sign in to your account and try hitting this page again.
I signed out. I cleared the cache. I signed in as a new customer. It just wasn't meant for my shower to have one of these. Not for $1, anyway. I can buy it at the sale price of $4.99.