Glass Needed
2.48 lbs
Per Piece
8.3 oz
Cost
$7
Pieces
4
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Price as of Jul 24, 2026. Product prices and availability are accurate as of the date indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Inputs
Result
Each tumbler uses ~13 oz of soda-lime glass. 4 × 13 oz = 52 oz × 1.20 buffer = 62.4 oz = 3.9 lbs × $3/lb.
Inputs
Result
Each ornament uses ~6 oz of boro glass. 6 × 6 oz = 36 oz × 1.25 = 45 oz = 2.81 lbs × $8/lb.
A standard blown glass tumbler uses about 12–16 oz of soda-lime glass. Larger pieces like vases use 24–40 oz. Always budget 15–25% extra for cullet, drops, and practice gathers.
Soda-lime glass is the most common and affordable choice for furnace glassblowing. Borosilicate (boro) is used for scientific glass and flamework, and lead crystal produces brilliant optical clarity.
| Glass | Cost/lb | Working Temp | Best For |
|---|---|---|---|
| Soda-Lime | $3 | 2,000°F | General blown glass |
| Borosilicate | $8 | 2,200°F | Scientific, flamework |
| Lead Crystal | $12 | 1,800°F | Fine stemware, optics |
Beginners should budget 30–50% waste (2–3 attempts per finished piece). Experienced glassblowers typically see 10–20% waste from cullet, color testing, and imperfect pieces.
Material cost alone is $1–5 per piece for soda-lime glass. Adding studio time ($15–30/hr), propane/gas, and color, a single piece costs $20–60 all-in for a hobbyist in a shared studio.
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Last Updated: Jul 24, 2026
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