This is a replacement cap for the handle of a Workman vacuum hybrid container. It is 3D printed (ABS-like resin). I made this because the handle cap of my vacuum hybrid container blew off and got lost during use. The dimensions are designed for a light press-fit, so it won't come off easily. It is made with a stereolithography 3D printer, so the surface is relatively smooth, but there may be some minor imperfections. Please refrain from purchasing if you are concerned about this. If your handle cap has come off and you are having trouble using it, please try this. You might only lose one at a time, but I will provide a set of two in case you lose another one. I have only confirmed the fit on the round hybrid container in the photo. *First generation vacuum hybrid container The second generation has the cap embedded in the handle. I have not been able to confirm if the size is the same.