Hi Justin,

Thank you for contacting Mearto with your appraisal inquiry.
These mugs - for tea or coffee - have been made since 2000 and came with a couple of different options for interior colors (also light blue and light yellow), though lavender appears to be the most popular color. $12-15 is the going fair-market price currently.
Based on the photos and information provided, and subject to examination, this is:

A Disney Store Footed Cinderella Coffee or Tea Mug
Made in Thailand, 2000-2015
Of circular section and tapering form with gilt rim and single loop handle, decorated on one side by Cinderella in her blue ball gown, the other side with the phrase "A Dream Is A Wish Your Heart Makes," on a gilt-rimmed foot, with lavender interior. Underside marked with manufacturer's mark and original $8 price tag.
(DIMENSIONS)
CONDITION: This mug appears to be in good condition; value assumes no breaks, chips, repairs or losses.
PROVENANCE: Inherited
$12-15*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, or questions/concerns, and thank you again for using Mearto.
~ Delia