Based on this product's specifications, here are some alternatives and similar models
Reservoir (200 mm) Singularity Protium 2.0 — Acetal, black (SC-P2-200R-ALBK)
Summary description:
Singularity Protium 2.0 200 mm reservoir is a cylindrical liquid-cooling component made from acetal in black finish. Designed for custom PC watercooling loops, it provides coolant containment and visual monitoring. The 200 mm length suits mid-to-large builds and integrates with fittings and pump tops for circulation and fill/bleed operations.