Bubble wrap insulation started life as bubble wrap for packaging and shipping. Manufacturers added reflective foil to the ⅜” thick material.
Travel Shop: Bubble Wrap Insulation
Insulation Materials: the Good and the Terrible
Insulated Bubble Wrap, Thermal Insulation Rolls
BubbleWrap
Double Bubble Insulation - White/Foil - 6' X 125' (750 sq ft
Understanding Bubble Wrap Insulation: Cost, Flexibility, and
Foil 500mm x 50m Bubble Wrap 10mm Bubbles - Stanley Packaging
SuperFOIL Bubble Foil Insulation for use in Roofs, Walls & Floors
3/16″ Double Foil Bubble Reflective Insulation, 48″ X 125′ Per