Low Poly Funnel

Printed at 0.2 layer height 

Infill doesn't matter, it will have one or two walls depending on the scale you give to it, but leave it at 20%, that will be fine

For this application I printed it at 150% scale, but you decide what suits best your needs

If printed in normal 100% scale the nozzle will disappear, bit it would still work perfectly

For best adhesion use a brim