Based on this product's specifications, here are some alternatives and similar models
Reservoir for custom PC liquid cooling Singularity Protium 200mm acrylic – SC-PROTIUM-M-BF
Summary description:
Singularity Protium 200mm is an acrylic reservoir designed for custom PC liquid cooling loops. The 200 mm cylindrical reservoir stores and feeds coolant, integrates into loop systems, and supports fittings at its ports (model SC-PROTIUM-M-BF). Suitable for custom builds and upgrades where visible coolant capacity, flow stability and leak-resistant mounting are required.