You are >! A halogen lamp! >!  I am fragile >! Indeed, you're made of glass and in many colors do I come, >! There are [coloured halogen lamps](https://ae01.alicdn.com/img/pb/063/408/269/1285864129077_hz-myalibaba-web2_15432.jpg) You can touch my cap >! You can handle a halogen lamp by its cup-shaped reflector But if you touch my stem >! But if you grab it by its cylindrical bulb... Unfriendly air will you meet. >! Once lit the grease from your fingers will cause it to explode and release the halogen gas inside.