TD105-30 speed pourers from Tom Dyer are perfect. Designed with a narrow spout, these pourers are able to dispense spirits in an accurate and controlled way - allowing you to pour drinks without spills or over-filling. 

Plus, the spout features a small breather hole that no only helps to aerate spirits as they're poured, but prevents liquid from glugging.

Thanks to their multi-sized secure bung, the pourers fit in a wide range of bottles, too.