There are many avocado stores in Alexandra Village due to the popularity of the Avocado Juice here. However one of my favourite stalls would be this Mr Avocado Exotic Fruit Juice. Thick, creamy and not too diluted, it comes with a sweet Gula Melaka taste and does not have that artificialness that some other stalls have.
$3 for a cup of small which is more than enough to satiate my thirst on a hot day!