Canon Law forbids anyone from wearing the consecrated hosts or carrying the Sacrament around on their person, or storing the Sacrament in their personal possession.
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Can. 935 It is not lawful for anyone to keep the blessed Eucharist in personal custody or to carry it around, unless there is an urgent pastoral need and the prescriptions of the diocesan Bishop are observed.
Can. 934 §1 The blessed Eucharist:
1° must be reserved in the cathedral church or its equivalent, in every parish church, and in the church or oratory attached to the house of a religious institute or society of apostolic life