Small balloons made from one-atom-thick material graphene can withstand enormous pressures, much higher than those at the bottom of the deepest ocean. These bubbles could be created intentionally to make tiny pressure machines capable of withstanding enormous pressures.

See the source article by following the link below:
Small balloons made from one-atom-thick material graphene can withstand enormous pressures, much higher than those at the bottom of the deepest ocean. These bubbles could be created intentionally to make tiny pressure machines capable of withstanding enormous pressures.