Best for Custom Merch dropshipping?

who is the best to use for dropshipping custom branded merchandise? I want to do tshirts, mugs, and possibly a few other items with my branding. I think I've heard teespring is good, but just for shirts? is there one that is worth having do it all, or should I do shirts at t-spring and the rest elsewhere, or?

Have you looked at http://www.bluecotton.com/? I know that on top of shirts, they do bags, mugs, hats, etc. Not sure if you're looking for more than that, but if not, they're pretty good.

Have you tried https://www.theprintful.com/ ? They do alot and have a free Shopify App that makes it seemless to set up and run..