![Klein bottles, 1995](https://coimages.sciencemuseumgroup.org.uk/221/535/large_thumbnail_1996_0548_0001__0001_.jpg)
Klein bottles, 1995
1995
Single surface models made by Alan Bennett in Bedford, 1995. Three toroid single surface vessels, one with the loop inside the torus, one with a narrow loop outside and one with a wider loop outside. All can be cut to produce a pair of single-twist Mobius strips. A Klein bottle has no edges, no outside or inside and cannot be properly constructed in three dimensions.