BACKGROUND: Menstrual health and hygiene (MHH) is a human rights issue; yet, it remains a challenge for many, especially in low- and middle-income countries (LMICs). MHH includes the socio-political, psychosocial, and environmental factors that impact women's menstrual experiences. High proportions of girls and women in LMICs have inadequate MHH due to limited access to menstrual knowledge, products, and stigma reinforcing harmful myths and taboos. The aim of this pilot was to inform the design of an MHH sub-study and the implementation and scale-up of an MHH intervention incorporated into a community-based cluster-randomized trial of integrated sexual and reproductive health (SRH) services for youth in Zimbabwe. The objectives were to investigate (1) uptake of a novel MHH intervention, (2) menstrual product preference, and (3) the factors that informed uptake and product choice among young women. METHODS: Female participants aged 16-24 years old attending the community-based SRH services between April and July 2019 were offered the MHH intervention, which included either a menstrual cup or reusable pads, analgesia, and MHH education. Descriptive statistics were used to quantitatively assess uptake and product choice. Focus group discussions and in-depth interviews with participants and the intervention team were used to investigate the factors that influenced uptake and product choice. RESULTS: Of the 1732 eligible participants, 1414 (81.6%) took up the MHH intervention at first visit. Uptake differed by age group with 84.6% of younger women (16-19 years old) compared to 79.0% of older women (20-24 years old) taking up the intervention. There was higher uptake of reusable pads (88.0%) than menstrual cups (12.0%). Qualitative data highlighted that internal factors, such as intervention delivery, influenced uptake. Participants noted the importance of access to free menstrual products, analgesics, and MHH education in a youth-friendly environment. External factors such as sociocultural factors informed product choice. Barriers to cup uptake included fears that the cup would compromise young women's virginity. CONCLUSIONS: Pilot findings were used to improve the MHH intervention design and implementation as follows: (1) cup ambassadors to improve cup promotion, sensitization, and uptake; (2) use of smaller softer cups; and (3) education for community members including caregivers and partners. TRIAL REGISTRATION: Registry: Clinicaltrials.gov Registration Number: NCT03719521 Registration Date: 25 October 2018.