Snapfish: 11-Oz Custom Photo Mug (1 for $6.5 or 2 for $10)

Example prices with shipping:

2 for $9.96 shipped ($4.98 each)
3 for $13.44 shipped ($4.48 each)
4 for $16.92 shipped ($4.23 each)
5 for $20.40 shipped ($4.08 each)
6 for $23.88 shipped ($3.98 each)
7 for $27.36 shipped ($3.91 each)
8 for $30.84 shipped ($3.85 each)
9 for $34.32 shipped ($3.81 each)
10 for $37.80 shipped ($3.78 each)