Measure the shelf, not the cabinet
You need the usable shelf width and depth (inside the side walls, behind the door and clear of the rear air duct), the internal height available for shelves, and each pack's diameter and height. Use the widest point of the bottle, usually the shoulder or base. Leave a small gap behind the door glass so bottles do not touch it.
Square grid or staggered rows
Square grid: bottles per shelf = floor(width ÷ diameter) × floor(depth ÷ diameter).
Staggered (each row nestled into the gaps of the one in front): rows are spaced 0.866 × diameter apart, so rows = 1 + floor((depth − diameter) ÷ (0.866 × diameter)). Alternate rows lose one bottle unless the width allows an extra half diameter. Staggering helps only when it adds a whole row; sometimes it gives fewer bottles than a square grid, so calculate both.
Worked example
Assumptions: single-door visi cooler with usable shelf 520 mm wide × 420 mm deep and 1,350 mm of usable height; 30 mm clearance above each layer; pack sizes as measured below.
| Pack | Size (Ø × H, mm) | Per shelf: square | Per shelf: staggered | Levels | Total (best) |
|---|---|---|---|---|---|
| 600 ml PET | 70 × 240 | 7 × 6 = 42 | 7+6+7+6+7+6 = 39 | 5 (270 mm pitch) | 210 |
| 330 ml can, 2 high | 66 × 115 | 7 × 6 = 42, ×2 = 84 | 7 rows × 7 = 49, ×2 = 98 | 5 (260 mm pitch) | 490 |
| 1 L PET | 85 × 300 | 6 × 4 = 24 | 6+5+6+5+6 = 28 | 4 (330 mm pitch) | 112 |
What the numbers show
For 600 ml bottles, staggering loses three per shelf because the narrow width cannot fit seven bottles in the offset rows. For cans, staggering adds a seventh row and gains seven per layer, about 17%. For 1 L bottles it adds a fifth row. The best layout depends on the pack, so count each one.
210 bottles of 600 ml is 126 litres of drinks, in a cooler that may be rated at several hundred litres gross. Shelves, air ducts and the gaps between round packs take the rest.
Holding capacity is not cooling capacity
A full cooler holds a lot of drinks, but it can only cool so many warm ones per hour. Restocking 200 bottles at 35 °C in one go means a long wait before the front row is cold. In summer, restock smaller quantities more often, put new stock at the back, and if you can, pre-chill in a backroom unit. Ask the supplier how long the model takes to pull a full load down from your shop's temperature.
Limits you should respect
- Keep the rear and top air paths clear; bottles pressed against the back duct block airflow to the shelves above.
- Check shelf weight ratings: a shelf of 1 L bottles can weigh 30 kg or more.
- Leave a finger gap below each shelf so customers can lift bottles out without knocking the row.
- Keep a few centimetres behind the glass so the door seals cleanly every time.
Frequently asked questions
- How many 300 ml glass bottles fit in a visi cooler?
- Measure the bottle: diameter and height vary by brand. Then apply the same square and staggered counts per shelf and divide usable height by bottle height plus clearance to get levels. Short bottles often allow an extra shelf level.
- Should I quote cooler capacity in bottles or litres?
- For merchandising, bottles of your main pack size is more useful. Note which pack and layout it assumes, because the same cooler holds very different counts of 250 ml cans and 2 L bottles.
- Does a double-door cooler hold exactly twice as many bottles?
- Often slightly more than twice, because a double-door cabinet may have one wide shelf with no centre wall, so you lose fewer bottles to side gaps. Sometimes slightly less, if a central post or air duct narrows the shelves. Count it from the shelf dimensions rather than doubling.
- How do I mix pack sizes on one cooler?
- Give tall packs the bottom shelves, where you can set wider pitch, and put cans and short bottles higher, where more levels fit. Count each shelf separately for the pack it will carry, then add the shelves together.
