I had a great aunt who used to make these .  I have one, but it is not one she made.

Bottle Cap Hot Plate Mat

A unique hot plate mat which looks like a bunch of grapes may be hung on the wall as a plaque when not in use on the table. Bottle caps are covered with crochet and sewed together, leaves and a loop stem are added, making a gift or bazaar item. Use string weight thread and size 7 or g crochet hook. Make grapes in purple, leaves and stem green.

In purple ch 6, join in first ch to form a ring.
Row 1: Ch 3, make 19 dc in ring.

Rnd 2: Rnd 2: Working in back lps of sts only ch 3, dc in same place, 2 dc in of next 19 dc, join with sl st in third ch of ch 3 first made.

Rnd 3: Ch 3, dc in each of the 39 dc around. Join with a sl st in third of ch 3 first made. Place this over a bottle cap and work next row.

Rnd 4: Ch 3, * sk 2 dc, dc in next dc, repeat from * 12 times, join and fasten off.

This complete one. Make 12 more covers in the same manner. Arrange as shown in sketch and sew together.

Stem-Fasten green thread at top of middle bottle cap and ch 30. Sl st in same space. Fill ch lp with sc.

Leaf-In green ch 4, 3 sc in second st from hook, 5 dc in next st of ch, 3 sc in last st, ch 1 to turn all rows.

Row 2: 3 sc in first sc, sc in each of next 9 sc, 3 sc in last sc.

Row 3: Sc in each st.

Row 4: 2 sc in first sc, sc in each of next 13 sc, 2 sc in last sc.

Row 5: Sc in each st.

Row 6, 7: 2 sc in first sc, sc in each remaining sc.

Row 8: 2 sc in first sc, sc in each of next 16 sc, 2 sc in last sc.

Row 9: 2 sc in first sc, sc in each of next 17 sc, 2 sc in next sc.

Row 10: 3 sc in first sc, sc in each sc across, 2 sc in last sc.

Rows 11, 12: Repeat rnd 10.

Row 13: 3 sc in first sc, sc in each of next 21 sc.

Row 14: Sk 1 sc, sc in each of next 15 sc, 2 sc in next sc.

Row 15: 2 sc in first sc, sc in each of next 13 sc, 2 sc in next sc.

Row 16: 2 sc in first sc, sc in each sc across.

Next 3 rows: Dec 1 st in first and last sc, sc in each sc between.

Row 20: Sk first sc, dec in next 2 sts, sc in each of next 6 sc, dec in next 2 sts.

Row 21: Sk first sc, dec in next 2 sts, sc in each of next 3 sc, dec in next 2 sts.

Row 22: Work 1 row even.

Row 23: * Dec in next 2 sts, repeat from * across.

Row 24: Dec in first 2 sts, fasten off.

Each side of leaf is shaped by the decreasing. This completes one.

Make 2 leaves.

Sew leaves to the bunch of grapes and stem as shown in the illustration.

The Work Basket November, 1955