Vinyl transfer tape can't heat up, so it will melt if you use it on projects that need to be heated. The Cricut heat-resistant tape was created for use with infusible ink transfers and the Cricut EasyPress, however, is the same product and can be used with any heat machine. When you use a heat press for cups, you won't be able to keep the transfer in place while you close the heat press. This transparent transfer tape allows you to precisely position the image on the garment and also comes off easily after applying heat.
This CLEAR mask allows you to precisely position the image on the garment and is then easily released after the application of heat. Sometimes, it may also be necessary to use thermal tape when applying transfers with a cap pressing machine. However, if you're using thermal tape for something other than a heat press, ask for a second opinion on which is best. Most industry application tapes are manufactured to transfer vinyl for signs that does not require heat.
In general, you won't need heat-resistant tape when you apply transfers to t-shirts with a standard heat press.