If you want to launch a merch business and intend to sell clothes (tshirt, hoodies, etc.), house hold items (mugs, cups, doormats, curtains, etc), various accessories like phone cover, mouse pads, etc. Redbubble is the platform for you. First of all, you do not have to make any kind of advance payment, secondly Redbubble not only manufactures products for you but also ships for you.