Portmeirion Glazed Stoneware storage jar Fashion Adverting crazed pottery, lidded; without backstamp. Anyway, it's up to you as a collector to decide.
This container is from the Portmeirion pottery Stoke on Trent (made in England) created in the "Corsets" design from 1968 Velocipedes series. Using the search engine, I found only one similar storage jar / container, without a lid. Sizes: diameter 10,5 cm and high 16, 5cm.