HongXing 550ml Triple-Steel Insulated Cup Flip Lid | Factory Direct

The 780ml version is the full-day vessel. The 550ml version is the everyday carry — the same triple-steel construction (316# inner, 304# mid, 201# outer) in the compact size that fits a handbag, a cup holder, a backpack side pocket, or a desk corner without dominating either. For the commuter, the student, or the office worker whose day does not revolve around a large water volume, 550ml covers a commute plus a work session, or a coffee that stays hot through the morning.

The triple-steel architecture carries the full material story from the 780ml version: a 316# inner wall for premium acid resistance with coffee, citrus, and fruit infusions; a 304# mid layer for structural corrosion resistance; and a 201# outer body for the durable, cost-efficient matte finish. The vacuum double-wall maintains hot drinks above 55°C for approximately 4–5 hours and cold drinks below 12°C for approximately 8 hours — the compact format's scaled-down thermal window, still covering a full work session.

The one-thumb PP flip lid opens over a silicone-sealed drinking port, with a full-perimeter gasket for leak-resistant bag transport. The matte powder-coat exterior in Brown, Purple, Blue, or Pink is fingerprint-resistant and colour-stable across dishwasher cycles.

For wholesale buyers, the 550ml completes the triple-steel capacity range: 780ml (full-day) and 550ml (everyday carry) from one product family, one material story, one supplier. The two sizes display side by side as a capacity choice rather than separate products.