LORELAI: How am I gonna fit my three sugars into Barbie’s Malibu dream cup here?
A reference to Barbie’s Malibu Dreamhouse, a dollhouse accessory for a Barbie doll, previously discussed.
Lorelai is saying the cup is so small is belongs in a doll’s house. We also discover she takes three spoons of sugar in her coffee.
The Annotated Gilmore Girls 
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