I purchased both the DIB cap and the silicone attachments around mid-December of last year, but my treatment plan changed, and I no longer need them, so I'm putting them up for sale. They have been stored at home since I bought them. I'm also willing to sell just the DIB cap or just the silicone attachments, so please comment. I will adjust the price accordingly. The DIB cap doesn't have an expiration date written on the box, but the silicone attachments have an expiration date of March 2027.