Graduated addition funnels with outside jacket for cooling and/or heating

Jacket extends from just below shoulder of vessel down to the bottom tube just below the stopcock. Stopcock is either 2 or 4 mm bore PTFE plug. Bottom drip tube extends to the edge of the lower, inner standard taper, joint. Top outer reinforced joint size matches the bottom joint size. Side hose barbs are size D for 3/8-in ID tubing. Fabricated from borosilicate glass.