Collapsible brass telescope- Harry owns one of these;
uses it for astronomy
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Collapsible cauldrons- Available at the (unnamed) cauldron
shop in Diagon Alley
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Color-changing ink- Harry is cheered up by seeing this
after realizing that he knows almost nothing about the wizarding world during his first trip to Diagon Alley
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Copper cauldrons- Available at the (unnamed) cauldron
shop in Diagon Alley
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Crystal phials- Can be used by Hogwarts students as an
alternative to glass phials; required by all Hogwarts students
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