Large Vase I made for some lego flowers. looks really nice in Matte filament in my opinion.
Prints well in the 0.2mm Strength setting with a 0.4mm nozzle. Id suggest downloading the STL and scaling/setting up the print to suit your preferences.
In general, PLA is not watertight as it always has some gaps between layers; increasing the base or layers doesn't really solve it. Also, having water in a 'PLA vase' for too long will make the PLA soft and thus not watertight anyway.
OP's vase is, as mentioned, perfect for Lego flowers.