http://www.amazon.com/dp/B00C8ADLKG/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=OBVBUNWL45Z4&coliid=I3AIKJZXK7UKZO&psc=1
Something like this. Basically the same as the Griot's foamer and other types that don't adjust like the Gilmour.