20oz Stainless Tumbler Your own site Profit Calculator

Sold from your own store, the 20oz Stainless Tumbler carries no marketplace or listing fee at all — just card processing at 2.9% + $0.30 — so it's the highest-margin channel here, provided you bring your own traffic. Right now Printful fulfills the 20oz Stainless Tumbler for $24.97 + $4.99 shipping, and Printify from $21.79 + $6.69; most sellers list it between $24.99 and $34.99.

At a $29.99 price with free shipping and Printful fulfillment, that's $1.17 in Your own site fees, leaving -$1.14 profit per sale — a -3.8% margin, so you'd need to raise the price to turn a profit at all. For the 20oz Stainless Tumbler, Printify is the more profitable fulfiller on Your own site — about $1.48 more per sale at $29.99 (all-in cost $29.96 on Printful vs $28.48 on Printify). Breakeven — the price where profit hits $0 — is $31.16 on Printful; sell below that and you're paying to make the sale.

The catch is traffic: your own store has no built-in audience, so budget for ads or content — the margin you save on fees often goes back into acquiring customers.