A small experimental product that is compatible with passport covers, for example, this cardholder was made in a set with this cover:
www.livemaster.ru/item/36653368-sumki-i-aksessuary-chehol-dlya-dokumentov-ili-pasportov-s-kar
The capacity of this cardholder is up to 8 cards. Two of them are in the transparent exterior sections (these can be travel cards
or a pass or some kind of ID card or rights, etc.)
When folded, it can be closed on one of the cards, a business card, or even a bill folded in four, while transforming into a kind of micro-pocket.
All transparent parts are made of polycarbonate. Very strong, flexible material used in vandal-resistant glazing.
The full set of photos of this thing can be viewed in the blog
www.livemaster.ru/topic/3413000-blog-kardholder-transformer
Sold separately or as a set.
While in the presence of.