TRENTON, N.J. — Nestle S.A., Mondelez International, Inc. and Unilever all have joined the Loop initiative, a new subscription-based model for distributing consumer goods to homes in reusable containers. The initiative from Trenton-based recycling company TerraCycle aims to reduce reliance on single-use packaging. Nestle, Vevey, Switzerland, will debut a reusable stainless-steel, double-walled ice cream container designed by its global research and development group in Bakersfield, Calif. The design and transportation will keep the company's Häagen-Dazs brand ice cream fresh and cold from the moment the canisters are filled to when they are delivered to people's homes. The new service will improve convenience while maintaining affordability, according to Nestle.