These are "non-branded" stainless steel (food grade 304) double-wall vacuum-insulated cups and tumblers. I have personally tested them against the big-name logo brand and can't tell the difference in how well they keep ice after 24 hours.
These are nearly identical to the "name brand" vacuum-insulated stainless steel cups that sell for $30 each. In fact, they are so similar that the lids will fit either cup; ours just don't have the fancy embossed logo. We laser-mark the full lenght of the cup for a bold look - S2000 l..