Amazon.com sells the Tablemate II Adjustable Portable Table that has three adjustable settings to let users adjust according to their body size, the way they're sitting and the activity being done. Walmart also sells the Tablemate II both online and in-store.
EBay sells the Tablemate II Adjustable Table in single units or as part of multiple unit deals. Kohl's and Alibaba also carry the Tablemate II Adjustable Table, as well as accessories.
The Tablemate II typically comes in white and sometimes includes an adjustable cup holder. Retailer websites commonly have customer reviews highlighting their experience with the table and typically offer limited warranties.