We were on the deluxe last year. It was myself, DH, and DSs 7 yrs old and 8 months old. We only received 3 refillable mugs, so I am sure you would need to purchase an extra 1 for someone under 3
Just FYI but milk and juice aren't included for the mugs. It's just soda, coffee, and hot chocolate but there is usually a lemonade and powerade option.
Child under 3 is not technically considered to be on the dining plan, so they do not receive any of the dining plan allotments including the mug. It is true what the above poster has noted - milk and juice are not available for mug refills.
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