RSVP Endurance Canning Funnel. Canning and preserving your summer vegetables and fruits can sometimes be difficult unless you have the right tools. This RSVP Canning Funnel has a wider rim to rests more securely on top of your jars and helps with canning of those larger items like small whole tomatoes and fruit halves and quarters. Made from stainless steel. The wide mouth measures approx. 6in. and the base measures 2.5in. Dishwasher safe.